Booztd 3 Posted February 12, 2007 Share Posted February 12, 2007 Guys Originally I purchased an RB25 Transmission because when I was researching the swap, I was under the impression that ONLY an rb25 bell housing and input shaft would work. So I sourced one for 800+125 shipping. During that time I was questioning whether or not the RB26 bell housing would work, however I couldnt get any one to get me measurements or take pictures, and RB26 trans arent just laying around everywhere. Anyways, fast forward to yesterday. After completion of the RB25/Z32 trans mating, I decided I should still have a look at the RB26 trans, since it was just setting there. Here are the pictures of the RB25 Bell Housing & Front Cover, next to the RB26 Bell housing & Front Cover My new RB25/Z32 setup on the left, RB26 stock trans on the right RB26 RB25 I did not get a picture of the very top of the bell housing to identify how far the input shafts stuck out on either one, but I remember eyeballing them and I cant physically see a difference. Remember from my 'how-to' post that we measured the lenght of the RB25 in put shaft and the Z32 input shaft and the Z32 was ~1/8" longer. To summarize all of this up. IN THEORY - the only thing you need to do in order to bolt a Z32 transmission up to your RB motor is swap the bell housings. The input shaft lenghts should be negligible, and will not effect anything. If anything, the Z32 input shaft is longer, so you may need to take a grinder just to shave some material off, but I dont suspect this being the case. In my defense, since I had already ordrered the tranny and done the research, and I knew that my Z32 trans had some grinding issues, I went ahead and rebuilt it. I could have saved alot of $$ and just pulled the RB26 bell housing off of the RB26 trans and swapped it with the Z32 trans. Quote Link to comment Share on other sites More sharing options...
alexideways Posted February 12, 2007 Share Posted February 12, 2007 So, that makes a 4WD VG30 also possible??? Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted February 12, 2007 Share Posted February 12, 2007 To summarize all of this up. IN THEORY - the only thing you need to do in order to bolt a Z32 transmission up to your RB motor is swap the bell housings. HELLO..... Thats whats been said by many for a long while now.... Here is a Z32 trans with a RB26 bell on it... Quote Link to comment Share on other sites More sharing options...
Booztd 3 Posted February 12, 2007 Author Share Posted February 12, 2007 HELLO..... Thats whats been said by many for a long while now.... Here is a Z32 trans with a RB26 bell on it... That would have definately been useful 2 months ago! Quote Link to comment Share on other sites More sharing options...
stony Posted February 12, 2007 Share Posted February 12, 2007 HAHA, Sorry dude like i said on the other forum its been known here for several years the interchangablility for the rb26 awd tranny/rb25/z32. live and learn... but like you said you had to rebuild the other one anyways. Quote Link to comment Share on other sites More sharing options...
Evan Purple240zt Posted February 13, 2007 Share Posted February 13, 2007 You can also use a z31 turbo trans. Evan Nice car btw, I saw the pics on the rb forums elsewhere. Quote Link to comment Share on other sites More sharing options...
Booztd 3 Posted February 13, 2007 Author Share Posted February 13, 2007 Nice car btw, I saw the pics on the rb forums elsewhere. Who's car are you paying compliments to? Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted February 13, 2007 Share Posted February 13, 2007 You can also use a z31 turbo trans. Evan Nice car btw, I saw the pics on the rb forums elsewhere. Yep, and the 88-89 Z31 Turbo trans is alot closer of a match to the RB25det trans than the Z32 trans is..... Here is a Z31 Turbo trans. Its virtually the exact same... Quote Link to comment Share on other sites More sharing options...
tay-fu300zxtt Posted February 13, 2007 Share Posted February 13, 2007 WOW now i have to buy another rb tranny damn! Quote Link to comment Share on other sites More sharing options...
Booztd 3 Posted February 13, 2007 Author Share Posted February 13, 2007 Taylor, I've got one for sale Quote Link to comment Share on other sites More sharing options...
tay-fu300zxtt Posted February 13, 2007 Share Posted February 13, 2007 I was just told a rb20 bell housing would work from a guy from skylinesdownunder. IS that true? Quote Link to comment Share on other sites More sharing options...
stony Posted February 13, 2007 Share Posted February 13, 2007 I think he may be refferring to the fact that the rb20 tranny will bolt up to a rb26 BUT the bellhousings will not interchange between the rb26 rb25 and vg trannys. its allot smaller then the others Quote Link to comment Share on other sites More sharing options...
tay-fu300zxtt Posted February 13, 2007 Share Posted February 13, 2007 I think he may be refferring to the fact that the rb20 tranny will bolt up to a rb26 BUT the bellhousings will bot interchange between the rb26 rb25 and vg trannys. its allot smaller then the others so the rb20,rb25 and rb26 bell housings are the same? if so cool! Because all i need is the bell housing Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted February 13, 2007 Share Posted February 13, 2007 so the rb20,rb25 and rb26 bell housings are the same? if so cool! Because all i need is the bell housing NO ITS NOT!! the only thing the same about a rb20 trans is it will bolt up to any of the three motors.... The rb20 trans front bell WILL NOT bolt to the rear section on a rb25, rb26 or Z32 trans. Quote Link to comment Share on other sites More sharing options...
tay-fu300zxtt Posted February 13, 2007 Share Posted February 13, 2007 damn, rb20 bellhousing wont work! Quote Link to comment Share on other sites More sharing options...
stony Posted February 13, 2007 Share Posted February 13, 2007 Quote Link to comment Share on other sites More sharing options...
Guest Straight6 Posted February 20, 2007 Share Posted February 20, 2007 But, how strong is a Z32 Trans versus an RB Trans? I was thinking this is a perfect solution for my project, yet I would prefer to stuff a Getrag along with the RB then to use a Z32 Trans, no? Quote Link to comment Share on other sites More sharing options...
Booztd 3 Posted February 20, 2007 Author Share Posted February 20, 2007 They are identical transmissions, all of the inernal parts are the same....thus making them equal in strength Quote Link to comment Share on other sites More sharing options...
Careless Posted February 20, 2007 Share Posted February 20, 2007 They are identical transmissions, all of the inernal parts are the same....thus making them equal in strength hot diggitty! Quote Link to comment Share on other sites More sharing options...
Guest Straight6 Posted February 21, 2007 Share Posted February 21, 2007 They are identical transmissions, all of the inernal parts are the same....thus making them equal in strength That is good news... Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.