Guest Slvrhase Posted October 5, 2002 Share Posted October 5, 2002 I got my '75 Z home last weekend, Will be building 350 for it and trans is still unknown. Next door neighbor has '86 Chevy station wagon he will sell me for $50.00. Looked at trans, not sure but appears to be 700r4. Question is, car has a 307 Olds, did the 700r4 have a universal mount pattern to it? I think the car was originally chevy engined, not sure. Would love to have OD in the Z. Will this work? Thanks in advance!! Allright, after searching further, I think it is a 200r4. Think that will work OK? I mean for $50.00 what can I loose. Well, besides $50.00!! Quote Link to comment Share on other sites More sharing options...
Guest jwelch Posted October 5, 2002 Share Posted October 5, 2002 Slvrhase; Sound like a good deal on the tranny. You can tell the difference in the two trannys by the tail housing. The 700R4 has a bolt on tail and the 2004R does not. I have a 700R4 and I like it but if I had to do it again I would go with the 200R4 because you have closer ratio from 1st to 2nd gear. This allows you to keep the RPMs up when taking off. Make sure you have someone that really knows these trannies to rebuild it. I went through 3 valve bodies in mine before it worked properly. I guess the 700R4 is famous for warped valve bodies. Here is a link to the gear ratios. Good Luck. http://www.oldengine.org/unfaq/leadfoot/trans.html Regards, Quote Link to comment Share on other sites More sharing options...
Guest jwelch Posted October 5, 2002 Share Posted October 5, 2002 Sorry about the link. Here is the correct one. http://www.oldengine.org/unfaq/leadfoot/trans.htm Regards, Quote Link to comment Share on other sites More sharing options...
Guest zfan Posted October 5, 2002 Share Posted October 5, 2002 If it is pre 1987 be careful the are notoriously weak! Mike Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 6, 2002 Share Posted October 6, 2002 The 2004R has an odd looking long oil pan the goes to the end of the tailshaft with an odd looking "sump" on the end and it is a universal fit.. Quote Link to comment Share on other sites More sharing options...
Guest Slvrhase Posted October 6, 2002 Share Posted October 6, 2002 That's it, it has the weird looking sump at the back. Anyone had any experience with one behind a 350? I will buy the car, fifty bucks, I just can't turn it down. The wife thinks I'm crazy, though. I'm new to this site and new to Z's. I rebuild cars for fun, about 1 every 2 years. Generally sell them, but I have been looking for a Z for several years. This is one car I think I'll keep. Just sounds like to much fun. Now...anybody want to buy a body off rebuilt VW Rabbit? Gotta sell one before the wife goes crazy. Thanks to everybody for the help!!! I like this site and the way you rarely here one beating up another for his opinion! Chuck. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 6, 2002 Share Posted October 6, 2002 Lot of people prefer the 2004R including me. Scottie GNZ our resident drag racer campaigns with a 2004R but it is also the high performance Buick Grand National 2004R model.The tranny should take a beating and keep on ticking up to 350 plus hp Low first gear for good take off and high overdrive for econmy and soaks up about as much HP as a 350 Turbo and less than the 700R4 Quote Link to comment Share on other sites More sharing options...
Guest Slvrhase Posted October 6, 2002 Share Posted October 6, 2002 That's great, sounds like it will do fine! 1 item decided on...15,000 more to go. Thanks! Quote Link to comment Share on other sites More sharing options...
Guest jc280zxt Posted October 7, 2002 Share Posted October 7, 2002 If the 200R4 is bolted to a 307 Olds engine (no adapter), the bellhousing is not for a chevy. Transdapt and others make adapter plates for this. I have heard that there were some 200R4's with both bolt patterns but have never seen one. The 200R4 is a good transmission except it can be a little weak. I had a 200R4 behind an Olds 350 (about 300HP) in a 1984 Camaro. The trans was stock (75,000 miles) from Olds wagon and it lasted for over 30,000 miles of hard driving before an oil cooler line ruptured and doomed it. It can be rebuilt and strenghtened if need be and may be money well spent. Also, the 200R4 is the length of a TH350 but has the mounts in the rear like a TH400. Have fun! Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 7, 2002 Share Posted October 7, 2002 The 2004R all should have universal bell housings.The trannys may not look like it on general inspections but the Chev bolt pattern is there if not you can buy as the previous post suggested a TCI adapter from Summit for less than $50.00. Double check that "307 Olds" engine If the Valve cover has 4 attaching bolt holes it is a Chev 305 Quote Link to comment Share on other sites More sharing options...
Guest Slvrhase Posted October 7, 2002 Share Posted October 7, 2002 It is, for sure, not a 305, bypass hose on WP gives it away. Everthing I can find on the 2004r shows them to all have a universal bellhousing. If not I guess I will fix the car and re-sell it, for fifty bucks it wouldn't be hard to make a profit. Will have to check out that adapter, also. Thanks again!! Quote Link to comment Share on other sites More sharing options...
Guest gbvol54 Posted October 8, 2002 Share Posted October 8, 2002 Good find on the 2004r. I'm looking for one to replace the 200C in my daugther's '82 Trans Am project. From all I've read they are a good light weight overdrive option. Quote Link to comment Share on other sites More sharing options...
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