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Hi, Try to replace the heater, I'm sure you will never see 240f again. When I had the issue 8 called ZF technical support and the tech guy told me that the heater valve should get fully open once reach to 180f. He said healthy temp for this transmission is 180f to 220/230f. He was the one who...

Hi, If this is this is the issue you have this part will fix it 100%. I did a lot of investigation before I replaced it and the only thing that go go worng with my Issue wast this bypass heater. I can express enough how happy I am for doing thing this. My transmission is not going over 205...

So I ended up ordering new transmission bypass heater. We installed it today. The new part DOESN'T have the bypass valve in it, they redesign this heater. So I ended up ordering and installing new transmission heater for the jeep, mopar part 68485460AB. When I received this part by mail I...

Yes, I get it every time. Dealer say no problem. I upgrade to mishimoto front cooler and it didn't do any thing. I'm thinking to cancel the transmission bypass heater.

Which cooler did you had?

Hi, I have the same issue with my transmission. Get to 230 on road and higher off road.. dealer won't do nothing without a code. I'm almost positive the issue is with the bypass heater valve. I'm thinking to take it completely. I also install mishimoto cooler in the front didn't do any different

Mine runs 210-224 street driving, 195-210 highway.. 37"s 4" lift kit.. I belive this temperature or considering OK for jeeps.

Hi, We install the mishimoto cooler, no need to replace the bypass valve we replacing the cooler. It didn't help. I called zf technician, very helpful I must say, the told me that the temp i get are not supposed the reach this level even when off roading, i have 37" on 4.5 long arm kit, even...

Hi, So happy I found this conversation. I have 2021 jl with 11k miles on it. After changing for 35s and small lift kit I did notice my transmission is getting over 250f when offroad. After couple of times I did go to the dealer, showed them the temp we got and the took the jeep for 4 days...

We have jl on 3.5" lift and 35" tires. Live in LA, hot, we are getting 200 to 215 on the road and 210 to 230 off road. I was very worry with this numbers, I called few dealerships here in California (not only the dealer I got the jeep from) they all said that it's very normal for this jl with...