hey thanks for sharing all this info ........just did my first transmission teardown and this thread was a lifesaver for double checking each step ........just finished it the other day ,so far transmission works good
i did this trans for a relitive and he wanted to use synthetic trans fluid ,i'm sckeptical and was thinking i might change the fluid to the mopor spec ,i've read more then once it's critical on these transmissions (my fathers truck ,he won the argument ,lol ,...but i might switch it w/o him knowing if its a nessesity).....any opinions on that be great
was a 46re from a dodge ram 1500 2wd
and agian thank u for taking the time to post all that
X2. I just finished my transmission and am going to stab it back in the jeep tonight. This tutorial was a major help.
FWIW, on the subject of the fluid, you have to remember we are dealing with the fallout of obsolescense here. What I mean by that is that if I look in my FSM for my 98 Jeep, ATF+3 (formula MS7176D) is what was specified for that year. ATF+4 hadn't even been developed at that point! Unfortunately, because of it's higher performance, Chrysler decided to supercede all previous fluids and just support ATF+4.
ATF+4 is better than ATF+3, but not better. Check out this link:
If you look, from a viscosity standpoint, +4 only suffers a 10% visco loss whereas +3 suffers 14%. Pretty negligible in my opinion. However, I would also direct your attention to the fact that Dex 3 suffers 40%. That should be all the reason you need to not run Dex in a Chrysler.
Another notable passage from the link:
"Contrary to popular myth, one of the stated goals of Type 9602/ATF+4 fluids was that it would have the same frictional characteristics as ATF+3. The paper explicitly states that this was because new clutch materials would not be introduced for this fluid and it had to be backwards compatible with ATF+3. Graphs in the paper show that the friction coefficient of fresh ATF+3 and ATF+4 is essentially identical, but as the fluid ages ATF+4 retains the “as new” coefficient while ATF+3 degrades."
So on fresh fluid, there is very little difference between +3 and +4 (except for cost). However, the older the fluid gets, the wider the margin between the two becomes.
So what does this all mean? If (and that's a big if) you could find +3, you would be more than okay to run it in your 46RE. But don't run Dex.
Anyone correct me if I am way out of line.