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M20 Gearbox


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#1 Orchid Torana

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Posted 02 June 2021 - 09:20 PM

Hi All,

 

I have a 73 LJ 4dr with a 202 and M20 gearbox.

 

Question 1 - Did this vehicle originally come out with a 202?

Question 2 - 4th gear has just started to pop out of gear. I actually have to hold it in gear. Some people are saying its the synchro mesh. The mechanic has looked at the linkage and says its not that.

Question 3 - Is the M20 the right gearbox for this vehicle?

 



#2 S pack

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Posted 02 June 2021 - 11:03 PM

The body ID plate will reveal if your 4dr was optioned with an M20 4spd transmission.

Along the bottom of the tag there are spaces for the Engine, Transmission and Rear Axle option codes.

Alternatively the VIN number from the long skinny tag can be used to look up the VML to see which transmission the car was originally fitted with.

 

Sounds like you have worn dog teeth or synchronizer hub issues.

Time to pull the box out for an overhaul.


Edited by S pack, 02 June 2021 - 11:07 PM.


#3 rodomo

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Posted 02 June 2021 - 11:36 PM

Sounds like you have worn dog teeth or synchronizer hub issues.

Time to pull the box out for an overhaul.

+1 . Usually caused by a circlip popping out on the main shaft.



#4 Orchid Torana

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Posted 04 June 2021 - 11:40 PM

Thanks Dave, yes its booked in for a full overhall.



Cheers ROB



#5 Orchid Torana

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Posted 04 June 2021 - 11:43 PM

Thanks again Dave. The plate is engine L20 with transmission M20, so everything matches.



#6 S pack

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Posted 05 June 2021 - 07:41 AM

Thanks again Dave. The plate is engine L20 with transmission M20, so everything matches.


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