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Gear Vendors install, 93 3500.......

I don't know that the syncro's are a problem, in themselves. It's usually caused by neglect or the wrong oil. 80/90 is too thick and can't lubricate the syncronizers, so even though there's 'oil' in the trans, they go bad. Sometimes very quickly. With enough of the right oil I've seen them live a long happy life. I'm not sure on pricing(it's been a while), but you can look around the web (quad4x4? a&reds?) for differrent places. We usually get our parts from a trans shop that's near by, though I have bought stuff from A & Red's before.
 
another mpg update.........
this week i drove 70 instead of 65 mph , 95% freeway, 595 miles on the tank, figured out to 19.8 mpg.
going to put in a 195° TS and turn up the fuel when i get a chance.
 
restoguy said:
Sorry to hijack, but I wanted to share a little info. Ace, you may already be aware, but running 80w/90 in an NV4500 will smoke the syncro's right quick! I'm not saying you did, just a warning to anyone who owns one. A guy locally doesn't learn too well and has replaced several 4500's and 5600's($$$!) in Dodge pickups he owns because of this.... You should use the specific oil from GM or Dodge, as Castrol(the oil's maker) doesn't sell SynTorq with their name on it any more. If you can't get the right stuff, Mobil 1 15w/40 is acceptable.


If you want to do it yourself, I'd say go-for-it. I've done it, and it's not that hard if you've got a couple special tools. Check out quad4x4 if you haven't already. They've got what you need.
Click to expand...
Already been there. Yep I suspect among other things the wrong oil was in it as well as upon removal the 5th gear nut was loose to boot.
 
deejaaa said:
are the syncro's a problem in both generations? what are the costs for them?
Click to expand...

about 500$ for a full set. I have heard alot of people complain 3rd gear goes. I had trouble with 3rd and 4th but mine was real bad.I did not take it apart yet, I bought a used one to replace it and will mess with this one when time and money allows.
 
deejaaa said:
i think i will get it balanced the more i think about it.
this was pulled from the GV site.

------------------------------------4.10----3.73
--------Trans Ratio-----------Final Drive Ratio
1st---------2.48------------------10.17----9.25
Over-------1.93-------------------7.93-----7.22
2nd--------1.48-------------------6.07----5.52
Over-------1.15-------------------4.73----4.31
3rd---------1.00-------------------4.10-----3.73
Over--------0.78-------------------3.20----2.91
4th-O/D-----0.75------------------3.08-----2.80
Double OD-0.59------------------2.40-----2.18
remember, GV is not the only option for an OD unit. as far as i know, they are the only one that is popular that is still in business or hasn't been bought out by GV. laycock, fairey, doug nash, volvo p1800, maybe more. parts for these are harder to find though.
Click to expand...
Took me a minute to figure this out but right now if I am correct my CUCV in 3rd is 1:1 with 4:56 so the GV has "double" OD ??
I don't have 4th so what would double over be ?
 
Found this..
TH375/400/475 3-SPEED AUTOMATIC
Axle Ratio 4.88 4.56 4.10 3.73 3.55 3.42
Trans Ratio Final Drive Ratio
1st 2.48 12.10 11.31 10.17 9.25 8.80 8.48
Over 1.93 9.44 8.82 7.93 7.22 6.85 6.60
2nd 1.48 7.22 6.75 6.07 5.52 5.25 5.06
Over 1.15 5.63 5.27 4.73 4.31 4.09 3.95
3rd 1.00 4.88 4.56 4.10 3.73 3.55 3.42
Over 0.78 3.81 3.56 3.20 2.91 2.77 2.67



So a GV on my CUCV would only knock the 4:56 down to 3.55. That is not that good. I could get the same from an NV4500 alot cheaper. I guess the real benefit with a GV is highway using it with an O/D trans.
 
Acesneights1 said:
Found this..
TH375/400/475 3-SPEED AUTOMATIC
Axle Ratio 4.88 4.56 4.10 3.73 3.55 3.42
Trans Ratio Final Drive Ratio
1st 2.48 12.10 11.31 10.17 9.25 8.80 8.48
Over 1.93 9.44 8.82 7.93 7.22 6.85 6.60
2nd 1.48 7.22 6.75 6.07 5.52 5.25 5.06
Over 1.15 5.63 5.27 4.73 4.31 4.09 3.95
3rd 1.00 4.88 4.56 4.10 3.73 3.55 3.42
Over 0.78 3.81 3.56 3.20 2.91 2.77 2.67



So a GV on my CUCV would only knock the 4:56 down to 3.55. That is not that good. I could get the same from an NV4500 alot cheaper. I guess the real benefit with a GV is highway using it with an O/D trans.
Click to expand...

you have 4.56 w/ a 3 speed. GV would get you a 4.27 ratio. get a NV4500 and GV will get you a 4.10 gear. or get a NV5600 for a 4.10 gear. or put a GV5600/GV for a 3.73 (GV says 3.81) which is what i ended up with. you are reading the wrong number.
 
deejaaa said:
you have 4.56 w/ a 3 speed. GV would get you a 4.27 ratio. get a NV4500 and GV will get you a 4.10 gear. or get a NV5600 for a 4.10 gear. or put a GV5600/GV for a 3.73 (GV says 3.81) which is what i ended up with. you are reading the wrong number.
Click to expand...
????
4.56x.78=3.56 exactly what the chart says...??
 
Acesneights1 said:
Found this..
TH375/400/475 3-SPEED AUTOMATIC
Axle Ratio 4.88 4.56 4.10 3.73 3.55 3.42
Trans Ratio Final Drive Ratio
1st 2.48 12.10 11.31 10.17 9.25 8.80 8.48
Over 1.93 9.44 8.82 7.93 7.22 6.85 6.60
2nd 1.48 7.22 6.75 6.07 5.52 5.25 5.06
Over 1.15 5.63 5.27 4.73 4.31 4.09 3.95
3rd 1.00 4.88 4.56 4.10 3.73 3.55 3.42
Over 0.78 3.81 3.56 3.20 2.91 2.77 2.67



So a GV on my CUCV would only knock the 4:56 down to 3.55. That is not that good. I could get the same from an NV4500 alot cheaper. I guess the real benefit with a GV is highway using it with an O/D trans.
Click to expand...

your right, my bad.
 
I would really like one of these units behind my 93 NV4500. It would be nice to use for spliting gears to keep in the power band while towing.
 
deejaaa said:
_
Click to expand...
I guess just dropped you a pm...would you be interested to meet I have a gear vendor and I need help to install seem to me there is no shop around to do so :-(

i am in Texas too, let me know what do you think
 
That's cool thanks.

I am in Texas. Mine is the remote kind (goes in between the drive shaft) it's a 2000 Dodge Ram 2500 camper van called 'roadtrek'

So far the supplied U shape bracket welded up (today), but I find no one who is able to take measurement cut the aluminum driveshaft and make two shorter ones, or to fabricate new ones from steel pipe.

Then some say mine will not work because my spedo connected in the dif. correct me but is it important? as far as I know it comes out from GV to have correct reading, is the GV needs it for anything, I think not, it works based on oil pressure (600 psi) that's all, right?

So there is my pain :) I am happy to drive down and land you some cash, I also have a spare GV electronics if you interested I can trade in, but don't have much time maybe Fri-Sat-Sun I need to drive up to New Hampshire (actually two weeks ago) van at least driveable now.

Sorry it's a bit long but wanted to give some info.
 
ahh, The Big D!. that is quite a way to go.
the GV needs speedo input to shift using auto mode. it gets the reading from the VSSB. mine was located behind the glove box. not sure where yours would be.
i cut my shaft and welded it. not real hard. might need to get balanced afterwards but mine didn't.
not concerned with money or trades. i'd do it just for the fun.
the roadtrek goes for a pretty penny. nice vehicle.
 
Not so sure that the GV needs to know speed to shift. The truck probably needs correct speed for shifting and ABS (if equipped).

Toward whatever the goal of installing the GV, one think go keep in mind is that it requires frequent fluid changes when compared to the rest of the driveline. So, it may prove more beneficial just to change the differential gear(s) and play with tires sizes. Just say-in ;)

There was a time when I was very interested in a GV, but now I am focusing on KISS and going the differential route.
 
GV gets the spedo input? The one connection on the case output to the dash right? What is VSSB :cool: ? Apart from that it needs 12+/12- and dash switch and the foot switch nothing else in my pack to connect.

Right now I have 3.92 ratio to get up to speed is a pain but getting 17mpg on highways (too afraid to check in the city) already ordered 4.56 pinion ring that hopefully fixes/helps the acceleration and with GV I will have enough gears to hit in the sweet spot. Double overdrive will put the final gear a bit taller still ,I think on flat will be just fine, but as soon as I hit hills will need lover gears, which I don't mind as I will have.
 
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