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Borg Warner 65 automatic transmission: shifting problem

XJ6 & XJ12 Series I, II & III 1968-1992

Borg Warner 65 automatic transmission: shifting problem

Old 05-15-2019, 02:24 AM
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Question Borg Warner 65 automatic transmission: shifting problem


Last week I bought a 1976 Jag XJ6

Now I have a problem with the Borg Warner 65 automatic transmission. When I start driving, the transmission does not shift from the first gear to the second / third gear for approximately one mile. After warming up, it will shift bumpy into second and third gear. The delayed shifting behavior improves after a longer journey.

I have changed the fluid (Liqui Moly Top Tec ATF 1300: specification Ford ESW-M2C 33G) and filter two times now. I also checked the fluid level when the trans was hot.

Before the first fluid change, the gearbox made a ticking noise after I had driven 300 miles home from the dealer. The ticking noise has gone after the first fluid change.

What would be the fix?

Thanks in advance!
Old 05-15-2019, 03:28 AM
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Firstly, welcome to the Forums. Please do an Intro in the New Members Area when time allows.

I will assume a carbied engine 4.2ltr S2???

Coupla thoughts from my very distant past.

1) Kickdown cable set too tight, fiddle with the 2 nut fiasco at the rear of the engine, and slacken about 3 flats at a time.

2) The little slides etc INSIDE the valve body of the transmission are jamming from crap fluid over many years. I have dismantled a few of them a very looooong time ago, and freed up the innards, and they are still running OK today, The details are lost in the fog of the grey matter, but if I can do it, it cannot be complicated.
Old 05-20-2019, 02:01 PM
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I have put Lucas Transmission additive in 3 Jaguars and both Jeep Grand Cherokees, last Jeep transmission went 255,000 miles before retiring. If Trans fluid is full, I just suck out some of fluid from dip-stick-tube with a small plastic tube ( 5' push all the way down to bottom of pan), using $6 hand pump from Harbor Freight, then add the Lucas additive. Other products may work as well?
Rgds David


Last edited by David84XJ6; 05-20-2019 at 02:04 PM.
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