FuzzFace2 Posted February 25, 2020 Share Posted February 25, 2020 I may have jumped on this great deal for the NP435 with out thinking it all the way thru I don't want to start the swap and find out I cant complete it for lack of more parts needed. The 2 transmissions are close if not the same length face to tail. Both have slip output yokes and that is 1 question Do they both use the same yokes? T18 is a 1981 the NP435 I think was a 1984. I do have the NP slip yoke but if I don't need to swap in on the drive shaft great but not a big deal. The next question is a big deal. The front bearing retainer would they be the same? I need to know if the out side dia. that index in the bell housing would be the same? I can get the measurement from the NP as it is on the floor but the T18 is still in the truck and I am using it. Someone have a T18 on the floor they can measure the retainer index dia.? I ask because my 1981 uses linkage for the clutch, the 84 is hyd. I do have the 84 bell housing & fork but I don't know if I could use it with the linkage setup? I would like to stay with the linkage as I rebuilt it and works good. I do have the hyd. pedal assy. but would need to get the master w/rod, hose & slave and the not fun job of installing it all. My clutch assy. is also new and has may be 1000 miles and would like to keep it. I think the spline count is the same between the 2 transmission but not sure? what you say? I believe the bell housings are the same length so the input shafts should be the same length between the 2 yes? Think I missed anything? The speedo will swap as per Gary and looks to be a go. Thanks Dave G. Link to comment Share on other sites More sharing options...
Frank Wyatt Posted February 25, 2020 Share Posted February 25, 2020 Many years ago I did a transmission swap the other way around, installed a B&W T18 in place of a NP 435. The index for the front bearing retainers was the same. It was a direct swap and went relatively easy. Link to comment Share on other sites More sharing options...
Gary Lewis Posted February 25, 2020 Share Posted February 25, 2020 Dave - I don't know the answer to the output yoke question, although I think they use the same yoke. However, you should be able to figure it out via this page: Documentation/Driveline/U-Joints. I've not spent any time with that info, but I'll bet you can figure it out. However, I have a T-19 and an NP435 that I can measure - if I understood what you want me to measure. But I'll take a chance - this measures 4.847" on the T-19. Need me to measure the 435? Link to comment Share on other sites More sharing options...
FuzzFace2 Posted February 26, 2020 Author Share Posted February 26, 2020 Dave - I don't know the answer to the output yoke question, although I think they use the same yoke. However, you should be able to figure it out via this page: Documentation/Driveline/U-Joints. I've not spent any time with that info, but I'll bet you can figure it out. However, I have a T-19 and an NP435 that I can measure - if I understood what you want me to measure. But I'll take a chance - this measures 4.847" on the T-19. Need me to measure the 435? http://forum.garysgaragemahal.com/file/n51910/T19_Bearing_Retainer.jpg If you could measure the 435 when you can so I see if it matches mine. It is that "4.847" measurement I am more concerned about. That is close to the 4.848 and the other is 5.125 it could be on what I am looking into. I have a plan and that is the part I need more than the output yoke as I have the 435 yoke. If I don't follow thru on my plan I could just do a swap if the T18 does not fit. Thanks Dave ---- Link to comment Share on other sites More sharing options...
Gary Lewis Posted February 27, 2020 Share Posted February 27, 2020 Dave - I don't know the answer to the output yoke question, although I think they use the same yoke. However, you should be able to figure it out via this page: Documentation/Driveline/U-Joints. I've not spent any time with that info, but I'll bet you can figure it out. However, I have a T-19 and an NP435 that I can measure - if I understood what you want me to measure. But I'll take a chance - this measures 4.847" on the T-19. Need me to measure the 435? http://forum.garysgaragemahal.com/file/n51910/T19_Bearing_Retainer.jpg If you could measure the 435 when you can so I see if it matches mine. It is that "4.847" measurement I am more concerned about. That is close to the 4.848 and the other is 5.125 it could be on what I am looking into. I have a plan and that is the part I need more than the output yoke as I have the 435 yoke. If I don't follow thru on my plan I could just do a swap if the T18 does not fit. Thanks Dave ---- Dave - I'm not getting out to the shop tomorrow as far as I know, but can check on Friday. Link to comment Share on other sites More sharing options...
Rembrant Posted February 27, 2020 Share Posted February 27, 2020 Both have slip output yokes and that is 1 question Do they both use the same yokes? T18 is a 1981 the NP435 I think was a 1984. I do have the NP slip yoke but if I don't need to swap in on the drive shaft great but not a big deal. Dave, I went from my 1984 3spd manual to a 1991 M5OD-R2, and the output slip yoke from the 3spd fit fine. I guess my point is, I assumed they were all the same. I measured it...teeth were the same, OD was the same, and it fit fine. Been running it even since. Link to comment Share on other sites More sharing options...
FuzzFace2 Posted February 27, 2020 Author Share Posted February 27, 2020 Dave - I'm not getting out to the shop tomorrow as far as I know, but can check on Friday. No rush I should got out to mine and start cleaning the 435 and get a measurement off it also. Maybe I will try to get out later. Both have slip output yokes and that is 1 question Do they both use the same yokes? T18 is a 1981 the NP435 I think was a 1984. I do have the NP slip yoke but if I don't need to swap in on the drive shaft great but not a big deal. Dave, I went from my 1984 3spd manual to a 1991 M5OD-R2, and the output slip yoke from the 3spd fit fine. I guess my point is, I assumed they were all the same. I measured it...teeth were the same, OD was the same, and it fit fine. Been running it even since. I would guess the 100/150 trucks being light duty might have the same yoke. That just got me thinking when I get out to the garage to see if the drive shaft w/yoke from the parts truck that had the SROD will fit the NP435? I will have to see if that trans bell is removable on the SROD and if so what the front bearing retainer index measures for S&G? Thanks guys Dave ---- Link to comment Share on other sites More sharing options...
Gary Lewis Posted March 2, 2020 Share Posted March 2, 2020 If you could measure the 435 when you can so I see if it matches mine. It is that "4.847" measurement I am more concerned about. That is close to the 4.848 and the other is 5.125 it could be on what I am looking into. I have a plan and that is the part I need more than the output yoke as I have the 435 yoke. If I don't follow thru on my plan I could just do a swap if the T18 does not fit. Thanks Dave ---- The 435 measures 4.837". Link to comment Share on other sites More sharing options...
FuzzFace2 Posted March 2, 2020 Author Share Posted March 2, 2020 If you could measure the 435 when you can so I see if it matches mine. It is that "4.847" measurement I am more concerned about. That is close to the 4.848 and the other is 5.125 it could be on what I am looking into. I have a plan and that is the part I need more than the output yoke as I have the 435 yoke. If I don't follow thru on my plan I could just do a swap if the T18 does not fit. Thanks Dave ---- The 435 measures 4.837". Thanks that is also close to the 4.848 that I am looking for. My plan and trans swap is put on hold till my son and his family find a place to live as the wife & I most likely need to help out with $$ Dave ---- Link to comment Share on other sites More sharing options...
Gary Lewis Posted March 2, 2020 Share Posted March 2, 2020 If you could measure the 435 when you can so I see if it matches mine. It is that "4.847" measurement I am more concerned about. That is close to the 4.848 and the other is 5.125 it could be on what I am looking into. I have a plan and that is the part I need more than the output yoke as I have the 435 yoke. If I don't follow thru on my plan I could just do a swap if the T18 does not fit. Thanks Dave ---- The 435 measures 4.837". Thanks that is also close to the 4.848 that I am looking for. My plan and trans swap is put on hold till my son and his family find a place to live as the wife & I most likely need to help out with $$ Dave ---- Hope things work out with your son and his family. Link to comment Share on other sites More sharing options...
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