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Old 06-03-2006, 08:35 PM
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Automatic transmission questions...

I have a 1987 caprice classic with a 4.3 liter, and I want to swap a 350 in it.

I believe that the transmission is a TH200c...although I'm not entirely sure. I looked at the pan, and I thought it was a TH350, but when I looked online I found out that the TH350 was discontinued before then, and that the TH200 pan looks 'almost the same'.

I think it must either be a TH200c, or a 200-4R, as it feels like it is shifting 4 times, although I assume that the "4th" shift (which only occurs after I let up on the gas) is torque converter locking up.

I assume that if the transmission was 200-4R, the shifter would have OD, D, 2, 1, or maybe just OD, 2, 1, but the shifter is D, 2, 1.

Anyway, the 350 I have is built up with 71 LT1 heads, an Engle 1018-H cam
(260/268 duration, .305"/.310" lift, duration at .050 216/226, lobe seperation 112), with an edelbrock torkerII intake, edelbrock 1405 carb, and hedman headers.

Will this shred the TH200? What transmission would be recommended? I was thinking either a TH350, or TH400...

Chris Flock

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Old 06-04-2006, 09:11 PM
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11 bolts in a T200 pan.. easy to identify.
High performance and T200 DO NOT mix unles you wish to spend major $$.
They are used in racing, but at great expense. A T350 will fit in the chassis; same slip yoke and overall length. The cable, dipstick and tube, and crossmember location will need to be changed, but the two trans will go in the same hole. Buy a reputable, local street/strip package (trans & converter package) and go away happy. About $600 should do it. Chassis mods will require more $$ but not much.
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Old 06-05-2006, 06:39 AM
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Unfortunately, I don't think there is anyone around here who does performance transmissions...

I did find a local scrap guy who had a TH350 and a TH400, he said I could have either for $200 bucks.

I looked over both of the transmissions, and it looks like the 400 is the same overall length as the 350, is this correct? Both of these transmissions would come with the slip yokes, so I guess I can just swap one onto the driveshaft if I need to.

Would a 400 be significantly harder to make fit?

Also, I have a Th350 currently on the back of v8, but it slips. Would I be further ahead to just buy a rebuild kit for this one? What might you recommend for a rebuild kit? I'm not necessarily looking for something that shifts really fast and hard, just something that will be able to handle the power.

Chris Flock
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Old 06-05-2006, 09:11 PM
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The 400 is likely a bit longer than the 350. Here's a site with dimensions: http://tciauto.com/tech_info/trans_dims.htm
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