89' fullsize bronco with AOD problems
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89' fullsize bronco with AOD problems
89 Bronco 302, AOD tranny.
I have had this problem over the last few months but thought nothing of it. I changed my tranny fluid and filter Shifting is just fine no problems I even seem to have a little more power in OD than I did before the fuid change. But the problem is when slowing down to stop the RPM's drop to 400 then SHOOT up to 1,100 with a hard downshift from 2nd to 1st. My Bronco idles with a warmed engine at 800-1,000RPM's in park or in gear.
What could the problem be?? the TPS?? if so can the TPS be cleaned in some way??
I just thought of something, I really OPENED up my air intake, could that be the problem???? Also changed my heads a while back, could I have messed up my TV cable some way?
Also a few people have said to drive with it in "drive" instead of "OD". The whole problem went away but now the ruff shifts are stating to come back.
I have had this problem over the last few months but thought nothing of it. I changed my tranny fluid and filter Shifting is just fine no problems I even seem to have a little more power in OD than I did before the fuid change. But the problem is when slowing down to stop the RPM's drop to 400 then SHOOT up to 1,100 with a hard downshift from 2nd to 1st. My Bronco idles with a warmed engine at 800-1,000RPM's in park or in gear.
What could the problem be?? the TPS?? if so can the TPS be cleaned in some way??
I just thought of something, I really OPENED up my air intake, could that be the problem???? Also changed my heads a while back, could I have messed up my TV cable some way?
Also a few people have said to drive with it in "drive" instead of "OD". The whole problem went away but now the ruff shifts are stating to come back.
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Joined: Dec 2001
Posts: 22,436
Likes: 17
From: Louisville,Ky.
It sounds like the lock-up converter solenoid is sticking. My Dad's 89 F150 did the same thing. The torque converter was staying locked until the engine almost dies then it would finally kick out at the last minute. It could be the switch or the solenoid. Both are in the valvebody.
The TPS sensor could be adjusted to far advanced making the computer think that the throttle is partly open.
Jimmy
The TPS sensor could be adjusted to far advanced making the computer think that the throttle is partly open.
Jimmy
