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HELP MY XJ trans issue

Old 02-02-2019, 10:49 PM
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Default HELP MY XJ trans issue

Hi everyone new to the community i recently bought a 89 xj 4.0 aw4 auto. when i bought it the trans was bad so i replaced it with a 97 23 tooth spline trans that i had to splice the harness into it and but a newer transfer case. my problem is that when is shifts from 1st to 2nd the jeep bogs wayyy down and the trans shakes if anyone has any knowledge please let me know thanks, colton
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Old 02-02-2019, 10:54 PM
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Did you replace the transmission mount as well?
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Old 02-03-2019, 10:56 AM
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Originally Posted by gat View Post
Did you replace the transmission mount as well?
no because it still looked good
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Old 02-03-2019, 03:56 PM
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Does looks good mean that it wasn't cracked or that the height would have been the same as a new mount?
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Old 02-03-2019, 04:01 PM
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If you are having shifting problems in the shift with the greatest difference in gears, then maybe you are just low on transmission fluid. Did you replace all of the fluid? Did you replace the filter? What was the condition of the previous fluid?
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Old 02-03-2019, 04:59 PM
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Originally Posted by gat View Post
If you are having shifting problems in the shift with the greatest difference in gears, then maybe you are just low on transmission fluid. Did you replace all of the fluid? Did you replace the filter? What was the condition of the previous fluid?
replaced every thing u asked except trans mount because it was still solid no cracks to splitting i'm beginning to think it's a solenoid problem because it goes from first to over drive
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Old 02-03-2019, 05:00 PM
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Must be illuminating the CEL light, then. Try to get a diagnostic done to see if any codes are stored. Also, does it normalize after 2nd gear or have you not attempted to run through the gears yet? Low fluid symptoms 1st-2nd are a very hard shift (slam) to a non-shift shuddering condition, lessening dramatically with acceleration if it does shift to 2nd.

Last edited by Idunno; 02-03-2019 at 05:33 PM.
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Old 02-03-2019, 05:42 PM
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Originally Posted by Idunno View Post
Must be illuminating the CEL light, then. Try to get a diagnostic done to see if any codes are stored. Also, does it normalize after 2nd gear or have you not attempted to run through the gears yet? Low fluid symptoms 1st-2nd are a very hard shift (slam) to a non-shift shuddering condition, lessening dramatically with acceleration if it does shift to 2nd.
my xj is a 1989 renix pre obd so it has the stupid RBD2 port in the engine bay and my dash doesn't have a check engine light
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Old 02-03-2019, 05:54 PM
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The free scanner at O'Reilly's should have a connector for that, but it will also require the power from the cigarette lighter which is also a part of the kit.

Did you check the fluid from your fill on a flat surface with the engine idling? The fluid has to fill the torque converter (much fluid) and the radiator (little fluid). Older transmissions require more friction when the fluid and filters weren't changed enough or the fluid was overheated.

Last edited by gat; 02-03-2019 at 07:47 PM.
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Old 02-03-2019, 09:39 PM
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Originally Posted by gat View Post
The free scanner at O'Reilly's should have a connector for that, but it will also require the power from the cigarette lighter which is also a part of the kit.

Did you check the fluid from your fill on a flat surface with the engine idling? The fluid has to fill the torque converter (much fluid) and the radiator (little fluid). Older transmissions require more friction when the fluid and filters weren't changed enough or the fluid was overheated.
yes everything fluid wise is good on the trans i filled the torque converter with 1 quart before i put it in and when i got the trans in i put 4 quarts in and started it and ran it thru the gears put it in neutral and checked it and filled to the line everything trans wise is fine so i don't know why it would be doing this first to overdrive thing
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Old 02-03-2019, 11:12 PM
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5 quarts total in the system sounds low.

"Description: AW4 4-Speed Automatic
Type: ATF+4
Capacities: 3.5 Quarts / 3.3 Liters (Service Fill) 8.2 Quarts / 8 Liters (Overhaul Fill)" - https://www.morris4x4center.com/knowledge-base/jeep-cherokee-xj-fluid-capacities-type

I'll try to find a second source.
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Old 02-03-2019, 11:39 PM
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Originally Posted by gat View Post
5 quarts total in the system sounds low.

"Description: AW4 4-Speed Automatic
Type: ATF+4
Capacities: 3.5 Quarts / 3.3 Liters (Service Fill) 8.2 Quarts / 8 Liters (Overhaul Fill)" - https://www.morris4x4center.com/know...apacities-type

I'll try to find a second source.
I seen that list from Morris before, but Dex/Merc 3 is the recommended fluid for the AW4.
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Old 02-03-2019, 11:48 PM
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The Chilton's shows 17 pints which is 8.5 quarts. The older A.T.F. is what was made for it at the time. I have exchanged my old fluid with A.T.F. 4 without a problem. It is backwards compatible.
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Old 02-04-2019, 12:55 AM
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Originally Posted by gat View Post
5 quarts total in the system sounds low.

"Description: AW4 4-Speed Automatic
Type: ATF+4
Capacities: 3.5 Quarts / 3.3 Liters (Service Fill) 8.2 Quarts / 8 Liters (Overhaul Fill)" - https://www.morris4x4center.com/knowledge-base/jeep-cherokee-xj-fluid-capacities-type

I'll try to find a second source.
I put 1 quart in the torque converter and 4 quarts in the trans just to start it then I started it ran it through all the gears put it in neutral and filled the trans to the line does anyone think this could be an electrical problem
tcu,tps,solenoids,bad wiring etc.????
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Old 02-04-2019, 06:50 AM
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Didn't the later transfer cases have a different number of lobes to trigger the speed sensor?
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