Originally Posted By moparx
Originally Posted By Transman
Originally Posted By moparx
as someone who has used dex3 in FWD transaxles for over 20+ years with absolutely NO problems, when +4 is supposedly the ONLY thing to use, what happens to 46,7, & 8RH/RE overdrives when type F is used ? [or dex3 for that matter]
beer


What FWD transmissions did you use Dexron in? What model years?


604/42LE/42RLE 4spd OD transmissions. 315k on a 95 with chrysler reman transaxle at 111k, 195k on 2000 with original transaxle, 146k on 2002 with original transaxle, and 162k in a '99 with original transaxle [current daily driver]. all of these in caravans, with the '95,'00, and '02 retired because the bodies fell off the floor pan.
also, my wife's 94 concorde with 142k on the clock. all of these transaxles had trans-go kits installed, for what that's worth. fluid and filter changed around every 10-15k. at first, it was just my ignorance of fluid types, but after no failures, i just kept it up. i then read a service bulletin that said to use dex3 if temps were under 40* constantly. shruggy so, i dunno, maybe i'm the luckiest guy in town ? remember, this is just MY experience with the front drive OD transaxles.
i was wondering, therefore, about type F in the A518. i did not know how the OD was lubed, but since it had clutches, i thought F would also help them lock up better. i'm missing something here, but i can't see it [old man's dysfunctional brain].
beer


Ok, that makes sense - all the seal material changed from low cost rubber compounds to Viton seals - I would have to check but if I recall correctly around 1998 model year for all the FWD transmissions.

The compounds in the rubber swell at different rates based on fluid types. We had issues with the crappy seals from 1989 til late 90’s. That caused bump stop, slippage, high CVI after higher mileage,etc. Changing to better seal materials and +4 fluid all helped the transmissions perform without issues. Changing the fluid like you did helped too.

Last edited by Transman; 09/17/18 11:03 PM.