45RFE Slipping Reverse.

[Rinst]

Hey guys new to the KJ forums. I have an 02 Libby sport with 206000km on the odo with the 45rfe and it slips in reverse only when hot, it works perfect in drive cold or hot even at wot. Fluid is nice and pink and is right on the full hot after about 30mins of driving. I can here the solenoids engage but it will not move unless rpms go to about 1500. Reverse works great when cold with no slippage at all and no delayed engagement. Im going to change the filters and fluid. But wanted to hear if anyone has any other suggestions as to why this is happening. Please let me know thanks.

 

[ltd02]

Mine is always slow to engage in reverse. ****** temp didn't make a difference though. The fluid and filter change would be a good first attempt. Not sure if anything in the following thread is useful but I had it bookmarked for some reason:

45 RFE no reverse | Moparts Question and Answer | Moparts Forums

I guess reverse has it's own clutches so perhaps your symptoms are a prelude to an impending failure. Sounds like it's time to take it to a ****** shop for a real thorough check.

 

[justjeeps]

Hey Rinst - If you only drop the pan you will still have a lot of old fluid in there.. I used a pump to pump out a couple of quarts at a time and put in more new fluid after I dropped the pan. It did take a week to replace all the fluid but it was way cheaper then a tran flush at the shop, besides now I have a pump for the diffs.

 

[J33Pfan]

isnt there a reverse band adjustment??

 

[Rinst]

Hey guys thanks for the input. I work in a lube shop so I can do everything with no mess and I'm going to be putting a drain plug in the pan so that I can do another drain and fill in a couple weeks. I haven't gotten around to changing the fluid and filters yet. So far I've called around and people are saying the filter may have fallen into the pan and is taking in air causing a loss of pressure in reverse when hot. Everyone that I've seemed to talk to doesn't think that the clutches are toast. As the other day I pulled an f150 out of the ditch in 4wd high when the Jeep was cold and it didn't slip at all and I was about 1/2 to 3/4 throttle. I have a pending code p0736 reverse incorrect ratio but it has never set the CEL yet even when it slips. If worse comes to worse I can get a used ****** for 350 with 175000km on it. A local garage will do the install for 450 if I supply all parts and fluid. I will keep you guys posted after I do the filter change this week.

 

[justjeeps]

I think there is two filters on the 02. One in the pan of coarse and the other some where around the cooler. Maybe some else will verify.

 

[ltd02]

I think there is two filters on the 02. One in the pan of coarse and the other some where around the cooler. Maybe some else will verify.

Yes, there are two. A screen type filter and a spin on filter and both are located beneath the pan.

 

[Rinst]

So I changed the fluid and filters last night. Found nothing in the pan. No clutch material, accumulator plate looked good. Reverse is better than it was but still not perfect. I can get it into reverse when hot by reving it a little then it will engage completely with no slipping even if I let off the gas and get back on it. But once I get it to go in reverse I can stop put it in neutral and back to reverse and it will work everytime. Also the solenoids sound weaker going into reverse hot then they do when selecting drive hot or reverse cold. Not sure where to go from here. Maybe drop the valve body and see what's going on ?

 

[ltd02]

How long was the last service before this latest pan drop? If not recent then you might want to try another short transmission OCI as you've only changed a small portion of the ****** fluid by doing a pan drop. This helped my 98 Ranger which had a long delay to engage reverse. Actually it was a common problem for the 5R55E.

A ****** shop can get a real thorough scan with all sorts of info like CVIs and such.

 

[Rinst]

Sorry for the late response been really busy with work and renovating our house. So the other day I ordered the 3 clutch seals that go on top of the valve body as I did some digging and found that someone else had that issue. I pulled the valve body out a couple days ago and the low/reverse seal was toast. Replaced all 3 of them, put it all back together, filled it up and reverse already seemed way better. Been driving for the past couple days and have not had one issue with reverse while hot. Thank you all for help really appreciate it.

I tried to add pictures but it wasn't working. I'll try again later.

 

[jeeptorino68]

awesome fix on the seals. mine occasionally has this issue so i will look into that when i install the shift kit.

any part numbers for those o-rings/seals?

 

[Rinst]

Yes Mopar Part # 04799778. My cost in Ontario was $5.35 each. I believe list was 10 or so.

 

[jeeptorino68]

How many per valvebody? 2?

 

[jeeptorino68]

anyone know how many of those seals per valve body?

 

[ltd02]

I just looked the part number up and when I went to the site it had a diagram and said three needed.

SEAL. Clutch Feed. 52119098, 52119099 for Dodge Wd75. #04799778

 

[jeeptorino68]

its amazing how much info is on the web, yet sometimes so hard to find...
Thank you!