rebuilding/modifying a th200

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rebuilding/modifying a th200

Postby philip1 » Thu Dec 24, 2015 6:33 am

I'm the proud new owner of a 1980 Monza coupe 4-cyl/auto. This car has a very experienced drivetrain 350k+mi. I'm planning to rebuild everything. The transmission is where id like to make a modification. I've located rebuild kits for the th200 that says t200/200c. Does anyone have experience adding the lockup converter to a t200? I'm looking at this as a mod that might help mpg. Any help is appreciated
Phil
Charlotte NC
1980 Monza Coupe
2.5l Automatic 2.73:1
white over tan
second owner
philip1
 
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Location: Albemarle NC


Re: rebuilding/modifying a th200

Postby 77nighthawk » Sat Dec 26, 2015 9:53 pm

Hey philip1, welcome to the board. I did some research, pertaining to your question. What I came up with is: TH200 were manufactured from 76-78, TH200C were 79-86. TH200C has less parasitic hp draw than a TH350, and a TH400, but were problematic due to the early design lockup convertor, as were the TH350C. Improvements on the lockup convertor, since the introduction of the 700R4, has greatly increased the reliability, and longevity, of the TH200C, and TH350C. That being said, you will need a TH200C to rebuild. Buy an updated convertor, and pay particular attention to input and output shaft end play, while rebuilding the tranny, as this is also a cause of premature tranny failure. There is a shim kit, if still available, to deal with the end play issue. Sorry for being so long winded, but this was all good information that I thought you might like to know. Have a good new year, Brad
If it don't scare me, I don't want it.

the growing collection
1977 nighthawk
1979 Monza hb
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Re: rebuilding/modifying a th200

Postby philip1 » Mon Dec 28, 2015 7:15 am

Thanks for the info. I will look for a good t200c but in the mean time I'll rebuild my t200 since miraculously it is still working at 388k
Phil
Charlotte NC
1980 Monza Coupe
2.5l Automatic 2.73:1
white over tan
second owner
philip1
 
Posts: 14
Joined: Mon Dec 21, 2015 6:27 pm
Location: Albemarle NC


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