B2600 gearbox converion help please

JAS · Post by **JAS** » Tue Oct 09, 2007 10:26 pm

Ok, so I have a R type gearbox from a 92 mazda B2200. same as the 87-88 b2600. and Ive got the 87-88 B2600 bellhousing (new from Mazda!)
I went to fit it up today and ran into a problem.
The gear box input shaft hits the crank. so much so that theres 10mm or so gap between the bellhousing and the block.
The block Im using is a wide block G63 (starion), And I fitted the bellhousing to the block to make sure it was the right one. fits fine, and the gearbox fits to the bellhousing good to.

Please help,

Jason

JAS · Post by **JAS** » Tue Oct 09, 2007 11:57 pm

As far as I konw Ive got the 2WD bellhousing.But I wouldnt have thought it would have made any difference.

Post by **DJpowerHaus** » Thu Oct 11, 2007 5:26 pm

is it possible that the b2200 input shaft is longer than the b2600 or rx7 input shaft? Oorx7 has an rx7/b2600 trans now so he may be able to measure too .

oorx7 · Post by **oorx7** » Thu Oct 11, 2007 6:20 pm

I have every thing bolted up. Although I don't have the crank in the block. so I can't really tell if it stacks up yet (input shaft to crank). I could possibly take it apart and measure it though. Would a tape measure be good enough. I don't have any precision measuring tools at home.

Post by **DJpowerHaus** » Sat Oct 13, 2007 12:06 am

I'll try to measure one of my RX7 transmissions tomorrow. I dont have any with a B2600 bellhousing, but hopefully this will help out. My last post was on an iPhone from NY. How cool are those things!?

JAS · Post by **JAS** » Sun Oct 14, 2007 11:46 pm

Thanks for the help guys.
A tape measure should be good enough to give me an idea of whats going on.
I would have thought that all the R type imput shalfs would been the same length, but I guss most car/truck manufactors like to change things so they can sell more parts.

Anyway keep me posted

JAS · Post by **JAS** » Tue Oct 16, 2007 1:18 am

Ok so I measured between the face of the bellhousing and the end of the input shaft. And the input shalf sticks out 5mm further than the face of the bellhousing....
Please let me know how others compare.

Jason

oorx7 · Post by **oorx7** » Tue Oct 16, 2007 8:22 am

Sorry I haven't got to measuring this up yet. I turned 30 this past weekend and haven't had much time to do much other than party

I will see if I can get to it this evening.

JAS · Post by **JAS** » Tue Oct 16, 2007 4:01 pm

HAPPY BIRTHDAY dude!!!!
Im not in much of a hurry as the cars still in millions of bits.
Ive just painted the engine bay, heres a link, check it out

http://forums.austarion.com/viewtopic.php?t=9467

oorx7 · Post by **oorx7** » Wed Oct 17, 2007 10:55 pm

Thanks.

Just looked at the trans. The end of the input shaft does not go past the bell housing.

BTW looks like a nice project that you have. I will be keeping an eye on it.

If you are looking for an rx7 trans check out www.rx7club.com there seems to be quite a few members in your neck of the woods.

Post by **DJpowerHaus** » Thu Oct 18, 2007 12:33 pm

I measured 124mm from the TOP of the flange that the sleeve is on to the tip of the shaft. It does not stick out beyond the end of the rotary bellhousing. Not sure if this helps, but its all the info I can give at the moment.

JAS · Post by **JAS** » Thu Jan 03, 2008 12:51 am

Ok...

I measured the input shalf and its 137mm from the same place you measured it. Very odd.
I guess my options are either make a spacer to go between the belhousing and the block or get a RX7 box and use the gear shift housing off the B2200 box.....

Any other ideas??

Post by **DJpowerHaus** » Thu Jan 03, 2008 3:23 pm

Find someone with a blown RX7 transmission and buy the input shaft from them and install it.

coltboostin · Post by **coltboostin** » Sun Jan 13, 2008 7:55 pm

DJpowerHaus wrote:Find someone with a blown RX7 transmission and buy the input shaft from them and install it.

Like me?

I have a Box that is 100% fine-striped 3rd gear making BIG power of the dyno.

I was going to fix it- but if you can use it.....

saturnshadow · Post by **saturnshadow** » Mon Jan 14, 2008 2:04 pm

so is there a difference from the 2wd and 4wd B2600 bell housing?
I have the 4wd one with a trans, i was planing on going AWD.

Post by **DJpowerHaus** » Mon Jan 14, 2008 3:11 pm

More likely its a difference between the input shaft lengths of the b2200 and the b2600.

JAS · Post by **JAS** » Fri Jan 18, 2008 8:32 pm

coltboostin wrote:
DJpowerHaus wrote:Find someone with a blown RX7 transmission and buy the input shaft from them and install it.
Like me?

I have a Box that is 100% fine-striped 3rd gear making BIG power of the dyno.

I was going to fix it- but if you can use it.....

Hey man. cool.
Where in the world are you though. Im in New Zealand

JAS · Post by **JAS** » Fri Jan 18, 2008 8:41 pm

Ive just been told that the Rx7 box has better synchros. And they're designed for high rpm shifting.
Would I be better to get a whole RX7 box and change the shifter.
Great... more money

Post by **DJpowerHaus** » Fri Jan 18, 2008 10:00 pm

Or you could just run it for a while and see if you notice a difference. No need to rush out and buy a whole box.

JAS · Post by **JAS** » Fri Jan 18, 2008 10:17 pm

DJpowerHaus wrote:Or you could just run it for a while and see if you notice a difference. No need to rush out and buy a whole box.

Thats true. What box are you running, and how have you found it?

Post by **DJpowerHaus** » Fri Jan 18, 2008 11:14 pm

I ordered a pallet of 5 RX7 transmissions imported from Japan. Plan was to sell 4 and keep one for myself for free, but I ended up not selling but 2, needed a spare and one had a bad bearing. Oh well.