Manual transmission hard to get into gear cold.

urr2slo

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Rick
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Phoenix
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Denali Duramax, Chevy Camaro, Jeep CJ7, C7 Corvette, MB S63
So I purchased my JLR last April and I didn't notice any issues until this winter. When the temp dropped below 50 out and first thing in the morning I noticed it was hard to get into 1st or reverse. I also noted that until the trans fluid got some temp in it shifting into 2nd and 3rd was less than smooth, sometimes would not want to go in. Once up to temp it shifts fine. I also noticed that the transfer case had become more difficult to shift into 4Lo on my last few outings. Last week I turned 5k on it and after doing research on different fluids I decided to go with RedLine C+ ATF which exceeds Jeeps requirements. Noticed an immediate difference this morning, shifted into all gears really easily and smoothly. Seems like the problem is solved for now.
Upon inspecting the trans fluid that came out, I noticed it was pretty dark already for only 5k on it and in the sunlight there is some glitter present, nothing that you can feel and not noticeable without a bright light. So I'm wondering what the cause is, I've done a few highway trips of an hour or slightly longer and some have had significant elevation changes where I'm climbing to 6000 ft and I'm wondering if the factory oil is overheating. I do tend to drive fast (85-90) on the open highways and with either my 35s or 37s I have to mainly use 4th gear, occasionally I can get into 5th, but mainly 4th.
The transfer case oil also seemed darker than I expected but I have used it a lot. I purchased if for play and it's not my daily. Most of the miles are going to areas to go 4 wheeling in or driving it in bad weather.
Anyone else had a similar experience with there manual?
 

RubiSc0tt

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Scott
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It's sort of characteristic with the manuals I've had. Both the AX-15 in my 98TJ and the NV3550 in my 04 Rubi as well as the Asin 6spd in my '19 JL don't like the cold start, shift into gear- but I live in NY so we're talking lower than 20 degrees in the winter. The only thing I noticed this year was when I woke up, Started my JLUR, and immediately put it into gear to move it into a parking spot at my complex. It was 2*F or something that day though, and I literally started the Jeep, put it in 1st, then reverse 20 seconds later, then off. 2 minutes total. It had been sitting since the previous night, and that was about 9am.
 








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