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#1055613 - 02/03/18 01:51 PM Recommended tranny for 383 stroker  
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O.G. Offline
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Virginia Beach, VA
I’m looking to do an engine swap in my 87 T-top SS, from my stock 305 to a 383 stroker. I am curious as to what you guys recommend for a transmission and rear end upgrade? Currently has the 200R4, if I remember correctly. Rear, end I’m not sure, but it’s also stock. Any opinions and recommendations help from engine all the way back. Thanks.

#1055615 - 02/03/18 03:03 PM Re: Recommended tranny for 383 stroker [Re: O.G.]  
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ratbuddy Offline
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Plantsville, CT
I've been doing some homework in that area. So far, the transmission to get seems to be this one, https://www.bowtieoverdrives.com/catalog/catalog_inc/viewitem.php?ITEMID=13 with the upgraded input shaft. There are other 200-4Rs out there, but that one seems to be the most universally recommended. Alternatively, these guys might make a great transmission, but I can't look at their website without getting a freakin' headache: http://extremeautomatics.com/th2004R.php

Rear, you got a few options. The factory 7.5" might live for a little while under some power, but you're on borrowed time, especially if you put slicks or drag radials on there. Probably the cheapest swap is an 8.5" from another G-body (Grand National/T-Type/442), but those are getting rare and may need rebuilding or strengthening to handle your 383. The ones that are already done right are gonna be expensive. Once you're looking at expensive, your options open up.

A Ford 9" can be built strong and is readily available for our cars. Here's a decent one, http://www.quickperformance.com/9-Ford-Complete-Rearend-GM-G-Body-78-87_p_20384.html - $2200 give or take, including the upgraded center section. Given that 383s these days are usually advertised 450+ hp, you'll probably want that upgrade. Downside, it's a Ford tongue

While you could adapt an old A-body 12-bolt into our cars, who knows what kind gears it has and what condition it'll be in. They're also getting harder to find in good condition. If you got money to burn, an aftermarket 12 bolt is the way to go. You can build one yourself starting at http://www.moserengineering.com/12-bolt-housing-axle-package.item or you can have someone put a package together for you, http://www.spohn.net/shop/1978-1987...r-Engineering-12-Bolt-Rear-Complete.html for example.

There's also the Strange S60 option, but I don't know much about that. I think it's based on the Dana 60, but that's about it. Personally, I'm gonna stick with a Ford 9" or GM 12 bolt simply because it's what I know.

#1055620 - 02/03/18 04:35 PM Re: Recommended tranny for 383 stroker [Re: O.G.]  
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Richie Cat Offline
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Lake Ronkonkoma, N.Y.
Give this guy a call, he uses a lot of quality parts in his transmissions. There are Grand National cars out there running 9's with his race units.
http://www.ckperformance.com/List/2004R/2004R-Transmissions


83 SC, 355 w/TPI
#1055624 - 02/03/18 06:53 PM Re: Recommended tranny for 383 stroker [Re: O.G.]  
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jmireles Online content
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El Paso, Tx
9" Ford rear ends are readily available, as opposed to GM 12 bolts or G-body 8.5 rears. The rear I bought from QP with disk brake conversion was closer to $2,800...I think...it's been a while. Lol!


-'87 Monte SS LS 2/4L65e Quick Perf. 9" w/disk brakes
-'89 Iroc Z28 Stock 5.7 Edelb. TES headers, Borla Exhaust90K
-'77 Trans Am 468(Stroked) Doug's Headers Flowmaster catback
B & M shift Kit 400 Turbo trans. Edel brock Performer
RPM Intake Sean Murphy built Rochester Carb. Restored
in '08. 3K
#1055626 - 02/03/18 08:36 PM Re: Recommended tranny for 383 stroker [Re: O.G.]  
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upflying Offline
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upflying  Offline
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Reno, NV
I just installed a QP 9" in mine, just break in miles so far. About $2600 shipped with Ford Explorer discs and an Eaton Truetrac posi It arrives in 4 UPS shipments to avoid freight charges.
Remember to clock the calipers at 9 o'clock, they interfere with the frame at 3 o'clock. I just got done installing the parking brake kit from Currie...part 6020E IIRC.
Great customer support at QP, answers questions quickly.


86 MCSS Notchback coupe, LS3, 4L65E, QP 9", Eaton Truetrac, 4 wheel disc, column shift, silver with maroon bench interior

[Linked Image]
#1055629 - 02/03/18 11:08 PM Re: Recommended tranny for 383 stroker [Re: O.G.]  
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SSLance Offline
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SSLance  Offline
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Peoria, AZ
T56 is always the answer! laugh and a 9" of some sort if for no other reason than all the brake options that come with it.


Lance
1985 Monte Carlo SS Street Car
#1055633 - 02/04/18 03:12 PM Re: Recommended tranny for 383 stroker [Re: O.G.]  
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RenoReno2 Offline
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Chicago, IL
A lot of people are putting in 8.8's out of an explorer using a kit from trick chassis. I have zero experience with it personally but I haven't read any negatives on it either. They're using the explorer because of the rear disc setup


88 Monte SS
#1055635 - 02/04/18 07:11 PM Re: Recommended tranny for 383 stroker [Re: O.G.]  
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MC96 Offline
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St. Johns MI
I built my entire 9" myself for about a grand, brakes and all. Granted I had a discount on parts then and access to the jig for housing ends.

8.8 does seem like the way to go lots of bang for the buck.


86 SS
400SBC, 4l80e, MSD Atomic injection/trans controller, Tilt glass clip, all tubular arms, corvette brakes, 9" rear
In progress
#1055652 - 02/05/18 12:45 PM Re: Recommended tranny for 383 stroker [Re: MC96]  
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Keithss Offline
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Jackson,mi
I had Extreme Automatics do mine. So far no problems, but I have yet to beat the poop out of it.
I too am looking at changing the rear end to something else, before it breaks.

#1055655 - 02/05/18 04:39 PM Re: Recommended tranny for 383 stroker [Re: O.G.]  
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Posts: 171
ratbuddy Offline
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Plantsville, CT
Keith, which factory rear ya using? How much power? Does the car hook or spin?

Thanks

#1055661 - 02/05/18 09:39 PM Re: Recommended tranny for 383 stroker [Re: O.G.]  
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Posts: 197
Keithss Offline
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Jackson,mi
I have the stock 7.5 rear end with 3:73 gears, and posi traction.
I am running 435 HP at the crank. I have the biggest tire ( I think) Nitto I can get, and still stay inside the wheel wheels wells.
It just spins.
I have an old thread under the restoration section showing what I have done, It's old so you will have to search for it.

#1055696 - 02/06/18 05:47 PM Re: Recommended tranny for 383 stroker [Re: O.G.]  
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Posts: 171
ratbuddy Offline
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Plantsville, CT
Ooh, you're giving me hope that my stock 7.5/3.73 posi will live under that kind of power :-P

#1055795 - 02/10/18 09:26 PM Re: Recommended tranny for 383 stroker [Re: O.G.]  
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Hey-O Offline
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St Charles , Mo
Hope under that kind of power but, if it hooks up hard you my be walking home, just saying. Been there, done that and got a t-shirt.





OUT OF THE DARKNESS RIDES THE DARK HORSE ... " HEY - O " ... LET THE HORSES RUN

502 HP, 383, Coan 350 Extreme, GV overdrive, Currie 12 bolt
#1055831 - 02/11/18 06:33 PM Re: Recommended tranny for 383 stroker [Re: upflying]  
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jmireles Online content
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jmireles  Online Content
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El Paso, Tx
Originally Posted by upflying

Remember to clock the calipers at 9 o'clock, they interfere with the frame at 3 o'clock. I just got done installing the parking brake kit from Currie...part 6020E IIRC.
.


If you go this route, then this mod is a must. I was warned by Lance about that during my build but I thought he was talking about caliper bolt interference. I hit a deep dip in the road and tge frame smacked the banjo bolt and brake line...in fact, it turned the line some and was leaking fluid. I had to bleed the beakes, top off and tighten the bolt some more. The nipple on the bleeder screw is also bent.


-'87 Monte SS LS 2/4L65e Quick Perf. 9" w/disk brakes
-'89 Iroc Z28 Stock 5.7 Edelb. TES headers, Borla Exhaust90K
-'77 Trans Am 468(Stroked) Doug's Headers Flowmaster catback
B & M shift Kit 400 Turbo trans. Edel brock Performer
RPM Intake Sean Murphy built Rochester Carb. Restored
in '08. 3K
#1055836 - 02/12/18 12:04 AM Re: Recommended tranny for 383 stroker [Re: O.G.]  
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Posts: 5,091
Onebadbowtie86 Offline
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Traverse City Michigan
For what its worth I ran my stock rear end for years beating the snot out of it with no issues. If you run at the track, run bias ply slicks vs drag radials, they will absorb some of the drivetrain shock. Plenty of 11 second ls f body cars with the same size rear.

If your going manual get atleast a t56.

If auto, I personally would go 4l80, but I have had bad luck with 700r4's and 4l60's.



'86 Monte carlo ss-Frame off resto-mod.
Ls2/t56/8.5"
#1055839 - 02/12/18 02:17 AM Re: Recommended tranny for 383 stroker [Re: Onebadbowtie86]  
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1 Slow SS Offline
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1 Slow SS  Offline
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Small town USA
Originally Posted by Onebadbowtie86
For what its worth I ran my stock rear end for years beating the snot out of it with no issues. If you run at the track, run bias ply slicks vs drag radials, they will absorb some of the drivetrain shock. Plenty of 11 second ls f body cars with the same size rear.

(Some are lucky others not)

If your going manual get atleast a t56.

If your running a pre T56 LS1 transmission plan on a solid rebuild first if its all original.

If auto, I personally would go 4l80, but I have had bad luck with 700r4's and 4l60's.

700 & 4L60E are not going to handle the power of a well build 200.



Last edited by 1 Slow SS; 02/12/18 02:18 AM.

Be a car builder, not a googler!
#1055843 - 02/12/18 03:14 AM Re: Recommended tranny for 383 stroker [Re: O.G.]  
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Onebadbowtie86 Offline
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Traverse City Michigan
Those are all great points from Ron.

dollar to dollar a 2004r will not compare to a 4l80. The 4l80 take a few more hp to get turning but will with out question be stronger. I guess it depends how much power you plan on making. plenty of guys running 600+ hp through stock 4l80's with a shift kit.



'86 Monte carlo ss-Frame off resto-mod.
Ls2/t56/8.5"
#1055868 - 02/13/18 12:26 AM Re: Recommended tranny for 383 stroker [Re: Onebadbowtie86]  
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1 Slow SS Offline
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1 Slow SS  Offline
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Small town USA
The 4L80E is the great option in autos for bang for the buck, not sure why I haven't went that route yet?? But I would say it's not too fare off when I start my Monte Carlo again. I currently have been busy on the disco bird and my sons SS Camaro that is going to be a beast.


Be a car builder, not a googler!
#1055886 - 02/13/18 05:36 PM Re: Recommended tranny for 383 stroker [Re: O.G.]  
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BadSS Offline
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BadSS  Offline
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Pearl, MS, 39208
Questions for O.G.
How much power is the engine making/going to make?
Are you planning on daily driving the car or going on very many long trips in it?
Are you planning on racing the car or more or less just cruising and kicking around in it a bit?

The reason I ask these things is the stock rear end with a cast stud girdle cover can handle a pretty healthy engine as long as you're not beating on the car at the track a lot. I was running 12.30s on slicks at the occasional trips to the track with a stock rear end and girdle and had no issues while running one. However, I grenaded one running low 13s without the girdle. Ford 9” is definitely the way to go if you’re going to be racing it.

As far as transmission, I know folks have had good results with a built 200r4, but there is no one in my area that can build one and EVERY one that I personally know that has bought a mail-order transmission has had problems with it. If there is someone that is nationally known that does business within driving range of you they may be worth keeping, but if not I’d stay clear of the 200r4. If you want to keep an overdrive transmission, go ahead and take the money you would have spent on the 200r4 and apply to a 4L80e.

If you’re not going to be driving the car very far or that much and/or it’s just going to be a weekend toy, then you can save a lot of money by going with a TH350 or TH400. Plus, there is usually someone close by for most folks that builds them for the local racers that you can trust to get it right for you. I daily drove a TH400 with 3.89 gears and 28” tall tires for years and while a little aggravating when running 60mph at 3,000 rpm in a 70mph zone, I never had to pull another transmission – well worth it to me,,, lol. However, I didn’t work that far from where I lived and didn’t have to hit the interstate to get there. Back when gas was ranging between $1.00 and $1.50 a gallon, I put pencil to paper and no more than I was driving it would have taken 5-years for me to break even between buying a fully built Art Carr 200r4 vs a TH400. Since I figured there was no way a 200r4 was going to last for 5-years behind my engine while running nitrous, it was a no brainer – while freshened twice, the TH400 is still going after 25 years. However, with the current gas prices, and availability of the 4L80e,,, I’m sure I would have gone with a 4L80e and been done with it.


Original owner of 1985 SS black hardtop w/gray interior. Frame-on restoration - 406 sleeper w/ heavily ported FIRST TPI. However the 1.875" headers, 3.5" duals, TH400, Ford 9", notched frame, and 10-point cage w/swing-out bars might tip you off it's not a lil' ole 305 TPI. Other mods: 2" drop, 18" wheels, f/r disk brakes, and custom stereo system.

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