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'89 Sovereign 3.6 gearbox

Per
Posts: 74
Joined: Thu Jan 01, 2015 7:50 pm

'89 Sovereign 3.6 gearbox

Postby Per » Thu Nov 30, 2017 8:13 am

The autobox of my daughter's 3.6 shows signs of a dying A-clutch (lumpy take off from standstill). Two questions then:
1) Which years/models use the same box? (2.9, 3.2, 4.0, '87 trough '94?)
2) ZF boxes are not known for easy DYI overhaul and parts are often an issue. Have anybody successfully done any work on those?
1989 3.6 Sovereign

naki_k
Super Moderator
Posts: 27278
Joined: Sun Feb 21, 2010 9:25 pm
Location: Kirton, nr Boston, Lincolnshire

Re: '89 Sovereign 3.6 gearbox

Postby naki_k » Thu Dec 07, 2017 11:39 pm

As always there’s lots of different part numbers for these boxes.
But essentially the 3.6, 2.9 and 3.2 autos use the same box. ZF 4HP22. But at some point along the way they changed the connection type of the oil cooler lines into the box. I think between battery under bonnet to battery in boot change over over.

The 4.0 box is entirely different, so avoid that one.

I may have a spare if needed.
PM me for details.
88 3.6 XJ6 PDH/CEM
90 Range Rover Vogue SE 3.9 V8 LPG
91 3.2 XJ6 SportPack Manual
91 4.0 XJ6 Manual
92 4.0 XJR Manual
92 4.0 XJR
93 3.2s - 4.0 Manual conv
93 4.0 Sovereign
93 6.0 XJ81 DD6
93 6.0 XJ81 XJ12
94 4.0 XJR
96 4.0 X306 XJR
96 4.0 X300 D6
97 4.0 X300 Sport Manual
2000 LR Discovery ES TD5 A
Breaking 40/ 300

Steve_D
Snr Member
Posts: 220
Joined: Fri Jun 20, 2014 1:45 pm

Re: '89 Sovereign 3.6 gearbox

Postby Steve_D » Mon May 07, 2018 1:23 pm

Have you tried changing the fluid? Only a thought but it's cheap as it's Dextron II and requires little work to do. My gearbox benefited from a fluid change and was smoother after. Of the circa 9 litres in there you can only change about 3.5 as the rest stays in - but still worth doing. Pls disregard if you have tried this.


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