ADVICE? Rear main seal replaced, now Trans kicks

98 Prerunner Ext Cab 2.7L w/ 200k


Hey folks,

I just had Rear Main Seal, Front Crankcase Seal, and Oil Pan Gasket replaced due to bad oil leak. When the shop was finished with the repair, they went to crank the truck and there was a very significant KICK when you put the truck into reverse, and a less pronounced kick when you shifted from drive to reverse.

The truck never displayed this issue before I put it into the shop. I am aware that the trans had to be removed to change the rear seal.

They kept the truck for 2 more days and replaced TPS sensor, said it was fixed. My only chance to pick the truck up was after shop hours today - and there is still a significant kick when shifting from PARK to REVERSE, and from DRIVE to REVERSE. To be fair, the very first time I shifted it there was no kick, but after I tested it more the kick quickly returned.

Before I picked it up the shop told me to bring it back Friday morning if I had any issues b/c they wouldn't be there when I came by. I will obviously take it back to the shop, but can anyone offer any help or insight? No clue why this would happen after the repairs that were done.


Thanks!


- Cameron

 

Im assuming this is an automatic transmission, first off i would check the level of ur fluid and make sure u have enough in the transmission, also make sure the correct fluid is in the transmission,( if ur shop had to drain and fill)..and the throttle possition sensor is involved with changes in the fluid pressure in ur transmission to change gears... Mabey they installed a cheap aftermarket sensor.. I usually dont like fter market sensors had to many bad experiences.

 

New sensor?. Yank the positive terminal first, reset the ecm. Try again and see if it goes away and then returns.

You might have had another TPS failure (or soon to fail with a code fooler rebuild).

Fluid levels good? I assume so.

If someone brain farted and put motor oil in the trans,,it's going to have a nice firm shift,,for a short time. Since you posted that it shifted fine right out of the shop, then returned, leads me to believe something else might be askew.

Make sure all associated connections that got unplugged,,didn't get damaged on the way back in or as the trans was scooted back to do the work. Club fingers on the connections usually twist a bit too hard with high mileage connections. Gotta go slow and methodical,,can't just get pissed and start prying stuff apart. I am sure your mech's probably know this.

 

Any follow up with this? Curious to what happened.

 

Still kicks when I shift to this day....

 

Did anyone check to see if they put the throttle cable for the Trans back in the same location? Sounds like it's a little on the tight side. Better there than loose

 

Came here to post this. Also make sure the trans mount is tight.

 

When was last transmission service? Possible you knocked loose some gunk, or tore something on the valve body gasket. With 200k on the tranny, it could just be age. Having the whole transmission out would be a great time to change the fluid as you could better drain the torque converter.

I wish this was more clearly and engine issue, would be easier to diagnose. Though the previous poster made a good comment, the second throttle cable effects the way the tranny shifts, check that, as well as the mountings as mentioned.

 

Check the kickdown cable, transmission mount, and shift linkage to ensure they're all installed correctly.

 

Cable does nothing standing still. Sounds like too high an idle to me.

 

Actually it does. It controls overall working pressure of the transmission. That's why it is located on the throttle body. The pressure in the Trans is proportionate to where the position of the gas pedal is. The further the pedal is pressed, the higher the pressure is in the transmission. So at idle the cable still affects overall pressure of the transmission. If the cable was on the loose side of adjustment, it would be lower on pressure which would cause a slow engagement into gear and also delayed shifts. If the cable where on the tight side of the adjustment it would cause over all pressure to run higher and have a quick snatchy engagement into gear. And quick shifts through the gears. There is a fine line between to loose and to tight. And yes obviously idle would also affect how the cable reacts. The op never mentions having a high idle. Just a quick harsh engagement. After his transmission was removed from his truck which requires taking this cable loose to physically get the transmission out of the truck.

 

It will change the shift pattern (late or early) it's part of the governor pressure control if it is improperly adjusted but it will not cause a harsh engagement. It would be noticeable in driveability the vehicle it would either shift late or too quickly if it was not properly adjusted.

 

its a 1999 . even back then there wére computeř controls . As mentioned above , its possible some of the electrical connections could no longer be makinģ proper contact . it wouldnt hurt to run a scan