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08-04-2019
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Newbie
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Join Date: Aug 2010
Location: Sydney, Australia
Posts: 48 What Jeep do I drive?: XJ
Likes: 17
Liked 3 Times in 2 Posts
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Transmission Delay in Engaging, Slipping When Hot
97 XJ Sport 305k / kms - my transmission has become slow to engage & when I was towing my empty box trailer the other day it almost stopped engaging altogether. I was pushing down the accelerator & the engine was just revving. When the engine & box are hot it’s worse. I changed all the solenoids & filter a couple of years ago & will replace the filter again today to see if it helps. It seems the engine is revving higher in general & the box taking longer to engage a gear.
I know the AW4 box in my Jeep is bulletproof but do we think it’s tired & needing a rebuild? Please let me know your thoughts fellow Jeepsters.
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1997 XJ (update shape) Sport 4L 295k kms
2004 WJ Laredo 4.7L 170k kms
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08-04-2019
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AJOR Gold
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Join Date: Nov 2012
Location: Perth
Posts: 1,465 What Jeep do I drive?: XJ
Likes: 1,064
Liked 1,080 Times in 692 Posts
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From what i have read before, Check/replace the oil and filter and also check the TV/throttle cable. The cable can have an effect on AW4 fluid pressure. Also, the TPS can cause slipping symptoms with the transmission.
Good luck,
Cheers,
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'95 XJ I6 4.0 AW4 NP242,
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08-04-2019
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Newbie
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Join Date: Aug 2010
Location: Sydney, Australia
Posts: 48 What Jeep do I drive?: XJ
Likes: 17
Liked 3 Times in 2 Posts
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Thanks a lot for your advice alexbrown. I'm reluctant to buy cheap Chinese sensors and from memory have bought German-made in the past. Do you have any tips on sensor suppliers (apart from the obvious RockAuto, Quadratec etc.) please?
__________________
1997 XJ (update shape) Sport 4L 295k kms
2004 WJ Laredo 4.7L 170k kms
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08-04-2019
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AJOR Gold
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Join Date: Nov 2012
Location: Perth
Posts: 1,465 What Jeep do I drive?: XJ
Likes: 1,064
Liked 1,080 Times in 692 Posts
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Do a Youtube search on how to test your TPS.
Ebay has Mopar ones.. https://www.ebay.com.au/itm/Jeep-Thr...-/250790618469
Not cheap, but they are OEM.
Summit has aftermarket https://www.summitracing.com/int/sea...rder=Ascending
Not saying that the TPS is your problem, but it can affect the transmission.
Get yourself one of those bluetooth Elm327 obd2 readers for less than 20 bucks and download the Torque app for free and see if your Jeep is throwing any codes.
Cheers,
__________________
'95 XJ I6 4.0 AW4 NP242,
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14-04-2019
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Rock Munki
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Join Date: Mar 2008
Location: Kellyville NSW
Posts: 2,381 What Jeep do I drive?: XJ
Likes: 178
Liked 351 Times in 223 Posts
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mate ask yr question on NAXJA.
Huge depth of knowlage on there regarding trannys (and most other things) we just dont seem to have here. good luck with it.
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Obd1 scanner.
'95 sport,4.6 stroker, 4.5" lift, 32"s, 4:10's, 8.25&SYE, taurus fan
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