Transmission shifting into overdrive

[Brian Alcorn]

42rle rebuilt 3k miles ago ... could be normal but it take a bit longer for the trans to shift into overdrive than the other gears ... was the same before the rebuild so guessing it's normal but never had another vehicle delay shift into any gear..it's like the shift is in slow motion or something . Then after being in overdrive for a minute or an hour if not on the gas the rpms will go past where it should be then resettle a second or two later when accelerating like it's slipping ... got 125k miles from purchase before losing overdrive and forcing the rebuild... she's currently at 434k miles however it does shift exactly the same before having issues . I guess what I'm asking is .. is there a way to speed up or make more solid , the shift to overdrive or is it totally normal ... rebuild came with 15 months or 15k miles warranty ... will also be adding a trans cooler in the next couple weeks ... before it gets hot

 

[Jerry Bransford]

Have you checked the ATF level while the engine is running? Where an automatic transmission is concerned it's better to be slightly overfilled than slightly underfilled. The engine must be running during an ATF level check.

 

[Brian Alcorn]

Have you checked the ATF level while the engine is running? Where an automatic transmission is concerned it's better to be slightly overfilled than slightly underfilled. The engine must be running during an ATF level check.

Yes have checked a couple times since the rebuild .. hot running in park and it's good

 

[Edgar Marton]

Hello, I think I filled in a little too much ATF (approx. 200 ml - 7 oz). Is this a problem for the transmission? Is there a drain plug? Or will the transmission drain overfilled ATF itself?
Thanks a lot.
Best Regards from Hungary

 

[hear]

Too much isn’t usually a huge problem. Usually if too much pressure gets built up it will just puke up through the breather tube.

If it isn’t giving you any trouble then I wouldn’t give it a 2nd thought. 7oz is only 2mm of additional depth in a 12”x12” pan.

 

[Edgar Marton]

Thank you "hear" for the quick and good answer. Now I am reassured. It's good to know that this forum always helps quickly and competently. Without you, my good old US Jeep would have long since been wrecked. Thank you rockauto.com . I just love US jeeps and will continue to repair them for as long as I can. (and as long as there is still blood in my veins....) I am German and live in Hungary and I have to say that American cars are so much better than German Jeeps. I would always buy American cars again (even if they are old and broken....). They are easy to repair and there are always spare parts available.

America is the best car nation in the world and I am grateful when I can repair my old Jeep. And I say that as a German who has driven a Mercedes for so many years. Best Regard from Hungary. Edgar

 

[Edgar Marton]

If I top up with ATF in the engine compartment, does the oil also go into the transfer case or do I have to top it up separately?

 

[hear]

If I top up with ATF in the engine compartment, does the oil also go into the transfer case or do I have to top it up separately?

They don't share fluid; you have to fill/drain/check them separately.

 

[Edgar Marton]

transmission/transfer case.... which fluid I have to fill in? I can buy Castrol Transmax in Hungary - but which one?

(1) Castrol Transmax Dexrion III H Multivihicle (automatic transmission)

(2) Transmax ATF DEXRON-VI MERCON LV Multivehicle

 

[hear]

If I'm understanding your question correctly, you absolutely need ATF+4 for the transmission. Don't try anything else.

For the transfer case, that same ATF+4 is recommended, but the needs of the transfer case are different from the needs of the transmission; the t-case doesn't require hydraulic pressure from the fluid so it is probably more forgiving. I know others have gotten away running different things in the t-case. I have no experience with that. But if you went to the trouble to get ATF+4 for your transmission, just get a little extra and put that into the t-case too.

The ones you've pictured appear to be Dextron III, which isn't going to be compatible. I would also be very wary of using something that claims to be "multi vehicle."

 

[Edgar Marton]

If I'm understanding your question correctly, you absolutely need ATF+4 for the transmission. Don't try anything else.

For the transfer case, that same ATF+4 is recommended, but the needs of the transfer case are different from the needs of the transmission; the t-case doesn't require hydraulic pressure from the fluid so it is probably more forgiving. I know others have gotten away running different things in the t-case. I have no experience with that. But if you went to the trouble to get ATF+4 for your transmission, just get a little extra and put that into the t-case too.

The ones you've pictured appear to be Dextron III, which isn't going to be compatible. I would also be very wary of using something that claims to be "multi vehicle."

Thanks for the quick reply - I've been using Febi Bilstein 29934 for my automatic transmission for 20 years - it's always been good so far. Then I'll use the same for the transfercase....