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Power drop in top gear. Bighorn 3.1 Auto 95


 
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Mark-70
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Joined: 05 May 2016
Posts: 12
Location: Cornwall

PostPosted: Sat Aug 31, 2019 10:23    Post subject: Power drop in top gear. Bighorn 3.1 Auto 95 Reply with quote

On inclines it accelerates up through all gears as it should but then it feels like it makes a very small up shift as in the revs drop slightly & it wonít pull anymore & seems flat in power. It feels like the torque converter lock up has engaged as the engine wonít rev any higher once this has happened. The O/D also works as it should including switching in and out on the switch except when the problem occurs then the switch makes no difference. If I release the throttle and reapply  it, and it has to be completely foot off not just eased off then it goes back to pulling well & will continue the incline ok. Occasionally it will happen again straight away but mostly itís fine. The check trans light works as it should when ignition turned on and goes out after a few seconds.. I canít find an OBD or the gearbox code check connector. I wondered about the TPS after reading a lot on here but the pump is electronic & doesnít have one on it, as is the throttle pedal.. maybe itís the electronic pedal...?
Apologies for the long post but have tried to include as much info as I can. Any ideas?
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