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replacement gearbox obtained

Posted: Mon Mar 10, 2014 11:09 pm
by Brakebuster
i have finally managed to obtain a GM400 3 speed gearbox for my V12 ,

this is from an XJ12 , from 1988 , it appears to have the gearbox speedo pickup on the side, but i am fairly sure this was just blanked off in favour of my electronic pickup on the diff in my 89 car , so shouldn't be a problem unless otherwise informed

i got it for a steal on ebay , but it will be about a five hour round trip to collect, but using a company car it won't hit the wallet , just my time

it was described as being removed three years ago from the 88 car with 80k miles , not long after it had its self received a refurb , and was to be a spare for a restoration project that didn't happen , time will tell , lol

firstly , i will try a flush and new filter on my existing box, to see if that improves the symptoms , but if not i will at least have a replacement box i could get overhauled that i can get fitted , or at least swap it round and get my own refurbed, i have a few options


wish me luck

BB 8)

Re: replacement gearbox obtained

Posted: Tue Mar 11, 2014 3:17 pm
by BigCatXJS
Good luck!

Those GM400 boxes are heavy b&ggers, from memory...

Re: replacement gearbox obtained

Posted: Tue Mar 11, 2014 4:06 pm
by J44EAG
Always carry a spare in the boot!

Mike