What all needs to be done to put a th-350 in an 88 camaro where a 700R4 used to be? TIA

 

Question: What are you trying to achieve?

 

I'm trying to install a transmission that can handle 450 hp.

 

My LPE 383 has about that much power. It shredded a 700R4 in 6 months with me grannying it. However that is a stock rebuild. I went to www.rosslertrans.com and theirs lasted 3.5 years with me beating on it.

How do you think LPE gets away with making all that outrageous HP and not have trannys breaking every week?

You will lose the overdrive and your cruising gas mileage will suck. Not worth it all IMO.

 

I know I am putting a 454 in my 82 z28 with a turbo 350 and you have to buy a special kit to mount your torque arm to. its like 79.99 out of jegs

 

A long tailshaft TH350 and a simple swap kit is all you need. The swap kit provides a relocated tranny mount and a way to attach the torque arm to the tranny as well as detent cable stuff. A TH350 detent cable is not the same as the 700R4's TV cable. Even the mounting bracket on the engine is different.

The long tailshaft TH350 uses the same driveshaft as the 700R4. The long tailshaft is 9" compared to the short tailshaft of 6".

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or check out the race car

87 IROC SuperPro race car
461 big block
Best ET on a time slip: 11.589
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Member of the Calgary Drag Racing Association

 

b/m 30299 kit so you can install the torque arm to the tranny. a th350 with 9" tailshaft so you can reuse the driveshaft in the car. a th350 detent cable, dipstick and tube, and torque converter.

just to reiterate what most have said already.

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fl-thirdgen.org#0004
moderator @ www.fl-thirdgen.org '86 t/a, 3.27, auto, homemade CAI, hypertech AFPR, comp cams 1.52 roller tip rockers, holley prostrip annililator ignition system, shift kit,
OEM corvette 2100 rpm convertor, lakewood adjustable panhard rod and trailing arms, edelbrock 6872 headers, catco 6007 3" cat, flowmaster 17151 3" single outlet catback. 14.91 @ 90.57 177.7rwhp 356.4rwtq

 

Question I have is why? Since the 700R4 can be beefed up, why go thru all the trouble of a TH350 swap? What is to be gained? If nothing then it is an excercise in futility. That and a loss of the overdrive for cruising which mine engages very often even in the city.

 

TH350s are cheap to buy. they are cheap to rebuild. they are cheap to beef up. I prefer the th400 for the closer ratios for a track car, though.

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1987 Camaro IROC-Z
Red on Red
350 with 52mm BBK Throttle body, throttle body coolant bypass, K&Ns, flowmaster muffler, and superchip.
1/8 9.8 @ 72mph

1985 Camaro Z28
400 bored .30 over, blower pistons, demon 750 cfm dual feed double pumper, hooker super comp headers, th350 with 3300 stall, 5.12 gears, minispool, six-point roll cage
1/8 7.64 @ 88 mph

 

Sounds almost too good to be true. All the positives and no negatives? That ALWAYS makes me suspicious. If it is true, then the one thing which I can see that will come back to bite you is the overdrive and lockup for cruising. I guess it won't matter too much if it is a Friday night driver tho.

 

Well it's true. They are cheap to buy and rebuild... they are also stronger stock than a 700r4... They also weigh more and have significantly different gearing. Very tall first gear in comparison to a 700r4...

 

Won't you get a bunch of wheel spin in first then? I would like to drop my first gear too. It is 3.06 1.86 1.0 0.7 but with the 700R4, that would not work. I still think that the money you save on the modification and spend to make the tranny work and the money spent in the loss of overdrive will prove the 700R4 beefed up will be the better choice. Just my 0.02

 

Flywheel also.

 

The gear ratios on the following transmissions are, 700R4: 3.06-1.63-1.00-.70. 2004R: 2.74-1.57-1.00-.67 TH400: 2.48-1.48-1.00 TH350: 2.52-1.52-1.00 Keep these numbers for future reference. With the right torque converter, the lower first gear is not an advantage in a lot of cases (harder to get the power down to the ground in first gear). I would not recommend changing transmissions from one to another to save some money, I would get the unit done right the first time. Let me know if I can be of help?

[This message has been edited by Pro Built Automatics (edited August 15, 2002).]

 

Thanks to all who contributed.