G series question

[Franko]

So I blew 4th gear in my transmission. Its a g series from a 94 lx protege. The closest thing I can find is a standard gearbox from a 97 626 v6. According to the mazda parts lookup program they are both g series transmissions but the begining of the part numbers are slightly different.

I understand that people change out fifth gear with the 626 one but what about fourth? Will it actually fit the shaft in the gearbox?

[wytbishop]

My understanding is that the internal components of all the G series trannies are the same. Even though the 6cyl won't bolt up tot he 4cyl engine and vice versa, the interior parts are interchangeable. Beware though...I know from my own experience that the different boxes have different bearings...so that may mean more differences that are not noticeable.

[Nd4SpdSe]

The gear is a shrink fit to the shaft. Where the gear is heated slipped onto the shaft then the final machining steps or completed. If you are going to change this gear you really should used the whole shaft otherwise the gear will probably become out of spec if it is heated and removed from the shaft and could micro fracture if removed cold creating all sorts of problems later. Also in certain cases I have seen were the gear and shaft were machined and one piece like in the trannys with the 4.588 final drive ratio

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[wytbishop]

In that thread we were talking about the pinion for the final drive. This question was about the fourth gear set. I think there's no reason why you shouldn't be able to use a 4th gear set from another G tranny. As long as you know what you're doing.

[mazda___mx3]

the g series trans have different gearing i believe, i know for a fact the the mx6 trans uses a lower gear ration in 5th, so your revving lower at the same speed than the mx3 one

[Ryan]

It doesn't matter what the ratio is, if you take the gear pair and they fit... then it will work. Which they should...

I didn't know these trannies were shrink fit... although I haven't pulled one apart yet

[Mooneggs]

maybe this is obvious... why not just use the whole 626 tranny??

[kast2L]

maybe this is obvious... why not just use the whole 626 tranny??

any particular year for the tranny moon?

[Nd4SpdSe]

maybe this is obvious... why not just use the whole 626 tranny??

any particular year for the tranny moon?

Franko's a 4cyl, so he can't bolt it up, but he can use the internals.

For the V6 guys, Mx-6/626/Priobe '93 and up

[Mooneggs]

ah got it... I'm a n00b when it comes to transmissions... sorry for interrupting here