rotaryrex7

I'm in the process of freshening up the 89 NA tranny in my track car and when I compared the new parts to those I was replacing, the 3rd/4th synchro ring was different. The old ones have a tooth missing every 1/3 of the way around and the new ones have every tooth. Is this an ugraded, superceded part? Mazda only shows the one part number.

The 1/2 gear synchro ring (new and old) has teeth all the way around and the 5th/reverse synchro (new and old) has one tooth missing every 1/3 of the way around.

Thanks, Jamie

RETed

Why not just install it and see if it works?
Mazda has changed a lot of the parts, since a lot of it hasn't be made specifically for the FC3S for a while.

Like...
The wheel bearings are from 626's. :P


-Ted

AdderMk2

where did you get your tranny rebuild kit and how much was it, did it come with all new bearings... im in dire need of a rebuild.. one of my bearings let go on me and the trans makes a horrid knocking noise.

RETed

I seen a Turbo II kit on eBay for like $250...
Else, you need to source all the little parts from the Mazda dealer.


-Ted

Cybaster

how hard is it to rebuild your own transmissions?

Syonyk

Very difficult.

The main problem is that it requires specialty tools that are totally different from tools used everywhere else on the car - huge snap ring pliers, gear pullers, slide hammers, etc. And, there are a lot of small parts that have to go in just the right order for things to work again.

The biggest issue is just the tools. I'm sure rebuilding a transmission with the proper tools isn't difficult, but it is a totally different tool set and different knowledge set from other work.

IMHO, the best thing to do with regards to a transmission rebuild is pull the transmission yourself, take it to a shop with the tools, let them rebuild it, and then install it yourself. You save the labor costs of the removal/install, and avoid fighting with the internals of the transmission.

Alternately, if you have a S4 NA, just get a decent tranny from someone local. There are enough transmissions laying around that people want to get rid of...

-=Russ=-

devlman

iTrader: (13)

Sounds fishy-- you sure they didn't send you two of the same (wrong) synchro? I'm rebuilding my 3rd gen and all the old and new synchros look exactly alike.