DerekTheGreat
Forum Regular
Found some good info about dimensions of all kinds of transmissions here:
http://forum.73-87chevytrucks.com/smforum/index.php?topic=32506.0
Then went here for more detailed NV4500 info: (Gotta scroll down & click on dimensions)
http://www.high-impact.net/transmission_and_gear/nv4500.htm#NV4500: General Information:
In summary:
2WD SM465 Dimensions:
Bellhousing= 6.5"
Case= 11.875"
Tailshaft= 5.625"
Bellhousing to yoke= 24"
2WD NV4500 Dimensions:
Bellhousing= 6.875"
Case= 12.375"
Tailshaft= 6"
Bellhousing to yoke= 25.25"
Difference= +1.25"
So based on this information I would need a different driveshaft or a donor vehicle. I did a quick calculation based on what setup you had and what you went to, With your SM465 & NP241 the length was ~36.875" but with the NV4500 & NP241 it should be ~37.75", (Difference= +0.875") based on the websites I pulled information from. So that almost suggests you wouldn't have been able to run your original driveshaft but you did. Getting confused a bit.. How much wiggle room is there? Seems if I could use the SM465's bellhousing I'll be ok but that's not possible.
Also, could not find any information about the location of the shifter for either NV4500 or SM465. None of the websites I came across mentioned any dimensional differences between 92-95 NV4500's or 96+ NV's.
As for the lean cruise thing I only see the speed sensor wires going to the trans. We've dealt with that already. Must be a switch for reverse but I didn't see anything which could sense it was in 1:1 to initiate a lean cruise mode. My GM service manual doesn't say anything about that either, only source for that info is the web. Shift light doesn't work and never has. Lit up when I was playing around with ECM's once (IIRC). When I had the scanner hooked up to it there was something in it that would tell me if the shift light was on or off and it was always "off."
Looks like the '96 parts truck I'm looking into will be sold by the weekend. Only time I have to look at **** when it's 50+ miles away.
http://forum.73-87chevytrucks.com/smforum/index.php?topic=32506.0
Then went here for more detailed NV4500 info: (Gotta scroll down & click on dimensions)
http://www.high-impact.net/transmission_and_gear/nv4500.htm#NV4500: General Information:
In summary:
2WD SM465 Dimensions:
Bellhousing= 6.5"
Case= 11.875"
Tailshaft= 5.625"
Bellhousing to yoke= 24"
2WD NV4500 Dimensions:
Bellhousing= 6.875"
Case= 12.375"
Tailshaft= 6"
Bellhousing to yoke= 25.25"
Difference= +1.25"
So based on this information I would need a different driveshaft or a donor vehicle. I did a quick calculation based on what setup you had and what you went to, With your SM465 & NP241 the length was ~36.875" but with the NV4500 & NP241 it should be ~37.75", (Difference= +0.875") based on the websites I pulled information from. So that almost suggests you wouldn't have been able to run your original driveshaft but you did. Getting confused a bit.. How much wiggle room is there? Seems if I could use the SM465's bellhousing I'll be ok but that's not possible.
Also, could not find any information about the location of the shifter for either NV4500 or SM465. None of the websites I came across mentioned any dimensional differences between 92-95 NV4500's or 96+ NV's.
As for the lean cruise thing I only see the speed sensor wires going to the trans. We've dealt with that already. Must be a switch for reverse but I didn't see anything which could sense it was in 1:1 to initiate a lean cruise mode. My GM service manual doesn't say anything about that either, only source for that info is the web. Shift light doesn't work and never has. Lit up when I was playing around with ECM's once (IIRC). When I had the scanner hooked up to it there was something in it that would tell me if the shift light was on or off and it was always "off."
Looks like the '96 parts truck I'm looking into will be sold by the weekend. Only time I have to look at **** when it's 50+ miles away.