TH350 to 200R4 or 700R4 ? - Team Camaro Tech
Transmission & Driveline Transmissions and Differentials

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post #1 of 20 (permalink) Old Feb 19th, 03, 06:55 AM Thread Starter
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Daniel
 
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I have a 1969 Camaro SS with a 350 V8, TH350 and Console Shifter.

I planning to change my rear axle ratio and possibly at the same time would like to swap the transmission to have an Overdrive for the highway.

Any advise on these kind of swap?

Would I be able to retain my stock console shifter handle? And how would it perform with
the additional position.

Thanks,
Daniel.

Daniel,
1969 SS-350 Camaro, Hugger Orange
2005 Black Mustang GT
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post #2 of 20 (permalink) Old Feb 19th, 03, 07:48 AM
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Someone correct me if I'm wrong, but from what I understand, the 200R4 is the same length as a Th350 with a 6" tailshaft. Thus, it is a bolt-in swap that doesn't require driveshaft mods. If you do go with a 200R4, you will need a TH400 crossmember.

I'm nearly finished with a PG to Th350 swap. If I wasn't on a fairly tight budget, I think I would have went with a 200R4.

Also, WWW.Shiftworks.com has all the accesories you need to convert your stock console or column shifter from PG/TH350 to an overdrive trans.

Good luck,
Mark P.

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post #3 of 20 (permalink) Old Feb 19th, 03, 08:02 AM
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The 2004R is the simplest for the above reasons. The only issue would be that I believe the only 67-69 Camaros that came with a TH400 were big blocks; and the big blocks were offset about an inch to the passenger side. This means you'd have to modify the stock TH400 crossmember to get the mount pad back in the center of the car or your engine/trans combo would be crooked. Other options would be to slide the TH350 crossmember back and re-drill the holes in the subframe (if it will move that much) or modify one of the two crossmembers if it won't.

You will love the difference of the overdrive, and the 2004R is the easiest to swap in in place of that TH350.

Jody
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post #4 of 20 (permalink) Old Feb 19th, 03, 05:13 PM
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Angry

700r4.com

Go here!

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post #5 of 20 (permalink) Old Feb 19th, 03, 06:13 PM
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What rear gear are you or will you be running? A 700r4 has a lower first gear so you won't need as low of gears resulting in more overdrive.

69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 TPI transmission, 12-bolt w/Eaton 4.11:1
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post #6 of 20 (permalink) Old Feb 26th, 03, 07:05 AM Thread Starter
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Thanks for all the information/responses.

I'm currently planning to have a 3.55 Gear installed.
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post #7 of 20 (permalink) Old Feb 26th, 03, 07:24 AM Thread Starter
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Would someone have a copy of this article from the Chevy High Performance Magazine from the January 2000 issue:

"SWAP INTO OVERDRIVE, EVERYTHING YOU WANT TO KNOW ABOUT TRANS SWAPS."

If so, would you be kind enough to scan it and to email it to me.

Thanks,
Daniel.
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post #8 of 20 (permalink) Old Feb 26th, 03, 07:25 AM
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Tom
 
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Angry

If you go with a 700r4 you may want 3.08's or 3.42's or your first gear may be too low. 3.07 x 3.08 = 9.5, compared to 3.55 x 3.07 = 10.9 . I've been told you want about 10. Tom

P.S. Check these online:

http://www.chevyhiperformance.com/techarticles/46140/

http://www.chevyhiperformance.com/techarticles/46278/

[ 02-26-2003, 10:49 AM: Message edited by: TJS69 ]
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post #9 of 20 (permalink) Old Feb 26th, 03, 09:27 AM
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Just an opinion and maybe because that's what I have but I think 3.55's are great with a 700r4. I wouldn't want anything deeper though.

Robert
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post #10 of 20 (permalink) Old Feb 26th, 03, 10:31 AM
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I went from a TH350 to a 2004R in my 69. It was easy and it works great! Now I can drive on the highway 70mph at 2100RPMS!

Best of 1.55 - 11.57@114.33
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post #11 of 20 (permalink) Old Feb 26th, 03, 02:22 PM
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hey rojo how much did the 700r4 swap cost you?
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post #12 of 20 (permalink) Old Feb 27th, 03, 01:53 AM
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Between $1400 and $1500 counting all the little pieces which add up real quick. I bought almost everything from www.700r4.com . Picked up a new flex plate and trans cooler locally. All this was 2 years ago so prices may have changed.
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post #13 of 20 (permalink) Old Feb 27th, 03, 04:54 AM
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Here is a crossmember for Turbo 400 if anyone is looking.


crossmember on ebay
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post #14 of 20 (permalink) Old Feb 27th, 03, 08:46 AM
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Quote:
Originally posted by paulm:
I went from a TH350 to a 2004R in my 69. It was easy and it works great! Now I can drive on the highway 70mph at 2100RPMS!
Nice website, PaulM. Sounds like I have a very similar setup as yours. I have a 383 Stroker with the (temporary) TH350 with a 3.08 12 bolt posi rear. (I have the camel hump 2.02 heads, Edelbrock performer intake and a 500cfm Edelbrock carb) I'm looking for a highway gear to improve my 11 mpg, plus lower my RPM's. I also want a little more power at launch. As is, I can barely break the tires loose from a stop, but if I'm rolling about 20 mph and floor it, HOLD ON! it's like a sling shot!
I was looking into switching to a manual 5 or 6 speed, but financially for the moment, I was leaning towards the 700r4. YOU however, have the 200r4, which I think has a little more pep on take-off and a little more leg on the overdrive, right? (forgive my lack of technical terms)
Do you still have the 3.08 rear and can you smoke the tires when needed? (i.e; stop signs, traffic lights, etc...)

I think you may have just solved my dilema of the week. [img]smile.gif[/img]
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post #15 of 20 (permalink) Old Feb 27th, 03, 09:27 AM
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I responded to your email but wanted to respond to your post as well. I had the 3:08s for a short time with the 2004R and could spin the tires pretty well with the 383/2004R/3:08 combo. I changed the 3:08s to 3:73s and can really "smoke em up" now. With the 3:08s the RPMs were really low anytime I was in overdrive, but with the 3:73s it is much better. With the 3:73s I get great "off the line" performance and still run 2100 RPMs at 70 mph on the freeway.

I chose the 2004R mostly because it was a direct swap. No driveshaft mods required. A TH400 crossmember and some odds and ends and it bolts right in!
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