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GM NV4500 ???

ryoken

ryoken

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what is the yr break for the GM NV4500? 93, 94 and than 95 and up?

from Novak Guide...


"The NV4500 is found in GMC & Dodge trucks. The bellhousing pattern for 1993-1994 GM versions is unique from the later (1995-) GM and Dodge units. The 1993 and 1994 Chevy versions have a lower first gear of 6.34:1 and an unsynchronized reverse gear. Transmissions after this period have a higher 5.61 low ratio and reverse gear synchronization."

https://www.novak-adapt.com/knowledge/transmissions/manual/nv4500/


from wiki


"
  • All 4wd use a GM specific 32 spline output
1991–1994 RPO MT8 Features:

  • GM NV4500 Transmission to bellhousing bolt pattern (not the same as GM 4speeds)
  • Right hand mounted hydraulic slave cylinder with fork mounted throwout bearing
  • 1991-93 1st and Reverse not synchronized
MT8 Gear ratios:

1 2 3 4 5 R
6.34 (1993) 5.61 (1994 on) 3.44 1.71 1.00 0.73 6.34 (1993) 5.61 (1994 on)
1995–2007 RPO MW3 Features:

  • Dodge Transmission to bellhousing bolt pattern
  • Concentric internal hydraulic clutch slave cylinder with integrated throwout bearing
MW3 Gear ratios:

1 2 3 4 5 R
5.61 3.04 1.67 1.00 0.73 5.61 (to 1997) 5.04 (1997 on)

"
 
ZooMad75 said:
'95 is kind of it's own thing and then '96 and later are pretty much the same.
Click to expand...


any idea on 95 specifics? what makes it dif than 96+ later? wanna swap the input to the dudge for my 12v and bolt it to my GM round 89 205..
 
What bell you planning on using, Dodge or Advance Adapter?
 
I think that 95 was when reverse ratio changed. Also might be the year the better top cover and shift tower came around. They are interchangeable, so dont let that be a limiting factor. Pretty sure it was a couple years later for sync'd reverse. I dont remember, but when I was looking for parts,tools, specs as you are doing now, there was some good info on quad4x4.com. if you are starting from scratch, you should jump on one of the ones a member on here keeps posting (capt ron, maybe). Hes west coast and seems to be tripping over them. If you want a beefed up init ( sounds like it) you will need a core anyway. If you really need a stout unit, look at rockland standard gear. Be reafy for sticker shock
 
The '95 is the first year for the higher 1st gear ratio at 5.61:1 of the later year transmissions but has the same mounting pattern as the early '94 and earlier GM 4500's. I thought the shift tower was the same as the early style too, but can't seem to find any documentation to it.

From Advanced Adapters website:
GM 4WD NV4500 (1995)
This transmission is identical to the 1993-94 transmission, except the 1st gear ratio had been changed to 5.61:1; 2nd 3.04:1; 3rd 1.67:1; 4th 1:1 ratio, and a 27% overdrive. The noise and shifting problems had been corrected.

Identification of this transmission can be obtained by using the identification charts in this manual. Due to the interchangeability of other NV4500 components, we also recommend that you verify the following information: Starting at the front, this GM transmission should have a input shaft pilot tip diameter of .590”. The spline of the input is 1-1/8” diameter 10 spline and protrudes approximately 6-5/8” from the face of the transmission. This input shaft can be interchanged with other NV4500 input shafts with this 5.61 1st gear ratio. The front bearing retainer index is 5.125”, with a snout diameter of 1.373”, and a front bolt pattern as above. The shifter stud on the top cover is a male threaded connection. The rear of this transmission has an aluminum adapter housing which measures 8-1/8” long; and the output shaft is 32 spline. Most transfer case adapters for this transmission will require the replacement of the tailhousing and the shortening of the output shaft.
Click to expand...

The '96 and Later GM versions of the 4500 used the same mounting bolt pattern to the bellhousing as the Dodge version. A '96 and later would be the one to shoot for to bolt up to a Dodge bellhousing.
 
ZooMad75 said:
I thought the shift tower was the same as the early style too, but can't seem to find any documentation to it.
Click to expand...
95 definitely has the later 4 bolt style shifter like 96+. I ended up using a 95 in the Crawlabago and have/had more 95s than any other year.
 
Capt Ron said:
95 definitely has the later 4 bolt style shifter like 96+. I ended up using a 95 in the Crawlabago and have/had more 95s than any other year.
Click to expand...
Thanks, I couldn't remember. It was rattling in my brain it was the same.
 
ZooMad75 said:
The '95 is the first year for the higher 1st gear ratio at 5.61:1 of the later year transmissions but has the same mounting pattern as the early '94 and earlier GM 4500's. I thought the shift tower was the same as the early style too, but can't seem to find any documentation to it.

From Advanced Adapters website:


The '96 and Later GM versions of the 4500 used the same mounting bolt pattern to the bellhousing as the Dodge version. A '96 and later would be the one to shoot for to bolt up to a Dodge bellhousing.
Click to expand...



ok, so 95 is no good than due to the bellhousing.. thanks for the info guys, mucho mucho appreciated... the search continues than.. :(
 
ryoken said:
ok, so 95 is no good than due to the bellhousing.. thanks for the info guys, mucho mucho appreciated... the search continues than.. :(
Click to expand...

The bearing retainer diameter is the factor that determines which bell housing fits. The later GM transmissions with the internal-slave bell housings have a larger bearing retainer diameter, which should match any Dodge unit. But if you have the smaller bearing retainer design, it will match the old SM465 bell housings rather than the Dodge bell housing that you are looking for. So you should be able to identify potential matches by seeing which bell housing style is attached to the NV4500.
 
ryoken said:
any idea on 95 specifics? what makes it dif than 96+ later? wanna swap the input to the dudge for my 12v and bolt it to my GM round 89 205..
Click to expand...

If you're just trying to run a GM transfer case, you can take a Dodge NV4500 and bolt on the tail housing (and probably the shaft?) from a GM NV4500 of any year. Just another combination to keep in mind, as you look through your options. Might work out well if you find a couple cheap cores lying around.
 
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