Frosty Posted January 2, 2017 Share Posted January 2, 2017 Doing some fault finding on mum's 3 Litre and think I have it sussed but. And it's a big but. The Detent springs that hold the selector rods in position are very soft and very short according to my workshop manual. The later MGB gearbox uses a lot of bits in common with the 3 Litre. So what I need to know is. Are the detent springs for the MGB box the same as the 3 Litre? A lot easier finding MGB parts than 3 Litre ones. Spec sheet says, free length 1.06" (30.2mm). loaded length 0.75" (19mm) and 18 to 20 lb (8.2 to 9.2kg). Can someone have a look at their MGB workshop manual and confirm or burst my bubble? Ether way it's a step forward. Cheers guys and Happy New Year. Suppose I should say how to tell an "early" from a "late" gearbox. Late has rectangle inspection plate on the left side with 10 bolts and a cluster of 3 bolts on the top left where the bell blends into the body of the box. Quote Link to comment Share on other sites More sharing options...
tortron Posted January 2, 2017 Share Posted January 2, 2017 . Quote Link to comment Share on other sites More sharing options...
tortron Posted January 2, 2017 Share Posted January 2, 2017 . Quote Link to comment Share on other sites More sharing options...
Frosty Posted January 2, 2017 Author Share Posted January 2, 2017 Plunger type but only the springs are knackered. Yes I know 3 syncro, 4 speed bits won't work in the later gearbox. And yes I have considered using spacers to get the load required but would much rather use replacement springs than a bailing twine and no 8 wire solution, especially when the car isn't mine. Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted January 2, 2017 Share Posted January 2, 2017 There's an engineer in Dunedin named Brian walker. He can make springs to order. I used him to get some springs made for my spring loaded locker. And he made some new springs for a bw75 lsd. I can try find his card if you like? He's not that dear really. Depending on how bad a dealer would gank you for new ones. Quote Link to comment Share on other sites More sharing options...
Frosty Posted January 2, 2017 Author Share Posted January 2, 2017 I've located some MGB GT ones in the UK for 59 pents each hence my question. Total would be under $20 shipped and duty payed. I might even just buy some and see. Will keep Brian Walker in mind though. Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted January 2, 2017 Share Posted January 2, 2017 Yeah that's pretty cheap! Quote Link to comment Share on other sites More sharing options...
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