Trans failure
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Junior Member
Joined: Feb 2019
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Trans failure
Cruising at highway speed’s last night, lost all gears including reverse. Linkage is working fluid was fine, parking gear works, dropped a valve body, and the third accumulator spring and cap Fell out, not sure if that’s normal but I think it’s somthing in the valve body . Transmission only has 50,000 kms on it was driving fine till this happened
Senior Member
Joined: Jul 2012
Posts: 583
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From: Utah
Cruising at highway speed’s last night, lost all gears including reverse. Linkage is working fluid was fine, parking gear works, dropped a valve body, and the third accumulator spring and cap Fell out, not sure if that’s normal but I think it’s somthing in the valve body . Transmission only has 50,000 kms on it was driving fine till this happened
Senior Member
Joined: Jan 2014
Posts: 188
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From: California
i found this video pretty interesting in seeing all the little parts... might help if you have yours open
Last edited by danlexani; Feb 7, 2019 at 07:24 PM.
Member
Joined: Dec 2013
Posts: 39
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Sounds like what I experienced.
Started with losing Overdrive. I kept driving the truck, as long as O/D was off, truck drove normally. After roughly 2-3 months, transmission started slipping. Parked it until I had the funds to give it the attention it needed.
After a LOT of reading, I learned that the overdrive actuator and the forward drum share a pressure circuit. The ring clip that holds the overdrive servo in its bore broke, allowing the servo to fall out. This starved the forward drum for oil pressure and allowed the clutches in the drum to slip. Once those burned out, no more forward momentum.
I ended up doing a complete overhaul on the transmission. This was my first transmission job I had ever performed. I found a series of YouTube videos of a guy tearing down and rebuilding an AODE transmission and followed it to the letter. It's been about 2 years now since then, and the transmission is still performing wonderfully.
I replaced the clutches, friction bands, and torque converter, as well as a new overdrive servo, Sonnax Sure-Cure kit, No other hard parts were needed. Total cost was $375 for the rebuild kit with bands, $150 for the Sure-Cure kit and $200 for the torque converter.
Started with losing Overdrive. I kept driving the truck, as long as O/D was off, truck drove normally. After roughly 2-3 months, transmission started slipping. Parked it until I had the funds to give it the attention it needed.
After a LOT of reading, I learned that the overdrive actuator and the forward drum share a pressure circuit. The ring clip that holds the overdrive servo in its bore broke, allowing the servo to fall out. This starved the forward drum for oil pressure and allowed the clutches in the drum to slip. Once those burned out, no more forward momentum.
I ended up doing a complete overhaul on the transmission. This was my first transmission job I had ever performed. I found a series of YouTube videos of a guy tearing down and rebuilding an AODE transmission and followed it to the letter. It's been about 2 years now since then, and the transmission is still performing wonderfully.
I replaced the clutches, friction bands, and torque converter, as well as a new overdrive servo, Sonnax Sure-Cure kit, No other hard parts were needed. Total cost was $375 for the rebuild kit with bands, $150 for the Sure-Cure kit and $200 for the torque converter.
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Joined: Dec 2013
Posts: 39
Likes: 2
The hardest part by far was removal and reinstalling the trans. Probably 1-2 hours each way.
The rebuild itself was straightforward. Set up two tables. Use an engine stand or similar to position trans with the bellhousing straight up. All parts come out as subassemblies. They go on the dirty table. Once all subassemblies are out and on the table, start rebuilding and pressure testing each subassembly, one at a time. After you finish with a subassembly, and have verified tolerances and proper operation, it goes on the clean table. Eventually the dirty table is empty. Then you reassemble the parts inside the case.
Total rebuild time, including removal and reassembly: probably 12 hours.
YouTube video I was referring to earlier -
https://www.youtube.com/playlist?lis...5QEwC3lH0oJCet
The rebuild itself was straightforward. Set up two tables. Use an engine stand or similar to position trans with the bellhousing straight up. All parts come out as subassemblies. They go on the dirty table. Once all subassemblies are out and on the table, start rebuilding and pressure testing each subassembly, one at a time. After you finish with a subassembly, and have verified tolerances and proper operation, it goes on the clean table. Eventually the dirty table is empty. Then you reassemble the parts inside the case.
Total rebuild time, including removal and reassembly: probably 12 hours.
YouTube video I was referring to earlier -
https://www.youtube.com/playlist?lis...5QEwC3lH0oJCet
Last edited by fuxxy; Feb 19, 2019 at 03:52 AM.