autobox question

dangeeeeerousss · Post by **dangeeeeerousss** » Wed Jul 04, 2007 12:56 am

hi
i have a 1986 rr 3.5 efi ring gear flex plate annd spacers and a sd1 gm180 auto box,torque converter. the problem is the torque converter is 3 bolt but the rr plate is 4
do i have the wrong bits and will the this gearbox work with this engine????
i am new at this and as much info i can get the better

also anyone know where the speedo drive is on the gm180
thanks

ChrisJC · Post by **ChrisJC** » Wed Jul 04, 2007 6:57 am

The Range Rover came with either the Chrysler A727* three speed or the ZF 4HP22 four speed auto. It sounds like you have the flex plate from the ZF box.

The SD1 came with the GM180 gearbox, which was never fitted to the Range Rover.

Basically you need to get the right flex plate etc from the SD1. The crankshafts are the same, so yes it is doable.

The speedo drive is probably electric.

Chris.

* - I think!

dangeeeeerousss · Post by **dangeeeeerousss** » Wed Jul 04, 2007 8:40 am

thanks chris

JSF55 · Post by **JSF55** » Sat Jul 07, 2007 8:08 pm

Yep the speedo drives are electric but it is possible to swop another model in ...might have been manta? to get it to run a cable, cheepest way round it is to use a push bike speedo and mount that off one of the wheels, they are very accurate, i think chris is right it is a 3 bolt for the 3 speed gm 180 convertor