Thread: Swapping TH350 to 200 4R

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I was told that I will have to move the rear cross member (trans mount) 6.5" farther back. Is this true?

Thanks for any help...Mike

Got this information from a post by Hellraiser79...

A TH350 short tail and a 2004 R are the same length from the bellhousing to the end of the shaft. So the driveshaft (27 spline) will work with either. The difference lies in the fact that the cross member for the 2004R needs to be back 6 5/8" further than it would be for a TH-350. A 700 R4 also uses a 27 spline driveshaft but it would need to be 3 inches shorter than one for a th350 or 2004R. The 700 R4 cross member needs to be 2 1/8" further back than it would be for a th350. Th200-4r also have a .67 to 1 overdrive ratio whereas a 700 R4 has .70 to 1. The 700 R4 has a 3.06 to 1 first gear compared to 2.74 for the 2004R.






More Information at http://tciauto.com/Products/TechInfo/trans_dims.asp

Thanks T-Bucket...that's exactly what I needed.

Thanks for posting that 25T! I've been thinking about swapping out my TH400 for either a 2004R or a 700R4, so the chart is real helpful.

200r and th350 are innerchangable except 200r relies on cable positon to shift