Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by rockin'g_racing, May 18, 2000.
does anyone have any information on swapping in a th350 trans in place of a 700r4 in an '86??
I just e-mailed you some info that I think may help, but Advance Adapters may be able to anwer questions like shaft sizes,spline counts, and overall lengths for the 2 trannies. I know that a 700 and 350 have the same bolt pattern. Good luck and sorry I couldn't have told you more.
<font color=purple>IF YOU'RE SCARED, SAY YOU'RE SCARED !!
AS long as both 4x4 straight bolt on.
Need the 350 tork converter.
Will bolt to engine using same lower cover.
Will bolt to TC using stock adapter that came with the other tranny.
350 and 700 have same rear extension/TC adapter bolt pattern same output shaft length and same output shaft diameter and splins count.
Rear mount and driveshaft length are the only probs.
But the 700R$ is a much better tranny.
Call steve hlmes at bowtieoverdrives.com about 700R4 options and information before you settle on a TH350.
Get the 350, the 700R4 is JUNK!! Just my oppinion from past experiences.
Keep the 700 lower first gear and overdrive. Most early 700
failed due to overheating. Newer ones and rebuilt ones with updates are all ok. Most failures in any auto trans come from lack of maintnace and over heating should always run aux. cooler with any auto transmission.
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