Borg warner model 8 gearbox

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Borg warner model 8 gearbox

Postby Galaxiecammer427 » Thu Jan 17, 2019 5:36 pm

Hi all, I'm a new member, and am hoping that someone out there might be able to help me.I have a'68 420G with a Borg Warner model 8 gearbox. It will not go into third gear. I have had the gearbox rebuilt, the company has had the car on close to six months, and they still cannot get it to go into third. Ithink the problem is outside the actual gearbox. The gearbox place has replaced all the clutches, and the valve body, and the pump. Is there any way that a 4.2xj6 box can be installed?

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Re: Borg warner model 8 gearbox

Postby DaveNeedham » Sun Jan 20, 2019 1:59 pm

Kick down cable too tight?

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Re: Borg warner model 8 gearbox

Postby RichardSEL » Mon Jan 21, 2019 10:26 am

FWIW part way through the production run of XJ6 series 1, gearbox was changed from BW12 to BW8 -- I don't know the reason. Is your plate like this?
BW12 AS2-12J Gearbox plate.jpg
What's the name of this firm? (so I know who to avoid :shock: )
Gone: '59 Mark I, '56 Mark VIIM, '59 Mark IX, '01 XJ8 Sovereign 4L LWB, '01 XJ8 Sport 3.2L, '01 XJ8 Exec 3.2L
Current: '03 Strange Rover L322
In trim shop for total refurb: '73 Owen Sedanca 4.2L
Stalled in storage '61 Mark IX with 4.2L

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Re: Borg warner model 8 gearbox

Postby Tintin » Tue Jan 22, 2019 3:13 pm

The workshop manual lists 12 possible causes of failure to upshift from 2-3. The only listed cause I can see that is outside the gearbox is "Manual linkage incorrectly assembled or adjusted".

Six months is an awfully long time. Perhaps it may be time to take the car elsewhere?

1996 4 litre XJS Celebration 2+2
Daimler Sovereign S1 4.2 1971

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