MGB Help

Author
Discussion

jasbo38

Original Poster:

6 posts

196 months

Wednesday 16th July 2008
quotequote all
Hi,

I have Marlin kit car with a MGB 1800 engine with 5 bearings. I believe it has a Marina gearbox.

What I would like to know is what gearbox in the MG range do I need to replace the Marina one to bring the stick into a more natural position.

Thanks
Jim

wildoliver

9,000 posts

223 months

Wednesday 16th July 2008
quotequote all
Well unless the car in question is an mgb then there is no guarantee an MGB box will bring the lever to a more natural position?

As to what gearbox is used well it's just an MGB gearbox, not really used in much else, and available quite easily, ranging from circa £20 for untested and probably suspect boxes from ebay to tested working boxes available from myself and other mg specialists for various prices, I tend to be in the £150 region as I make sure all the boxes I sell are totally tested. Some others are cheaper.

jasbo38

Original Poster:

6 posts

196 months

Wednesday 16th July 2008
quotequote all
hello oliver
i see pictures of mg boxs with remote linkages the marina one is forward in the length of box ithought with remote it would bring it back also 3/4 synchro where in age do they come in very confuseing anyway thank you for your info i am obliged
jim

wildoliver

9,000 posts

223 months

Thursday 17th July 2008
quotequote all
I know the small marina's had the triumph stanpart box, and as far as I am aware so did the 1.8 marinas just with a different bellhousing/backplate assembly.

The stanpart box is right on it's limit imo with a tuned 1500, start putting b series torque through it and I'm not surprised they throw problems.

The b series box is robust, if you get one that isn't showing problems (jumping out of gear, weak synchros) then provided you look after it you shouldn't suffer any problems, they hate people sitting with hand on lever or being rushed.

You have 2 options, overdrive or non overdrive, both bring lever to same place, non overdrive are very cheap, I don't think i have any tbh. Overdrive is the best box as you get that nice split third and the cruising 4th.

You will probably need an MGB prop, or at least to swap the MGB flange on to your prop, although the marlin may have been designed to use the B prop as standard. If you measure your existing prop and let me know I can measure the difference between the 2 boxes and let you know if a B prop is the right length.

You will probably also need the engine backplate, flywheel, clutch assembly, slave cylinder, flexi pipe, gearlever and overdrive gearknob to complete the package.