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  #1  
Old 07-17-2007, 10:01 AM
Hooter Hooter is offline
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Default '94 5 speed trans fluid recommendation

Now that my PMD is fixed, gonna start servicing the beast. Aside from the high dollar GM synchromesh fluid, is there a good alternative to this that I can put in my dually 5 speed with the granny low? On my '92 truck with a V6 and 5 speed, this was the only stuff that would work and shift well. I tried auto trans fluid, Mobil 1 oil, gear oil, etc. I think this trans in my diesel holds a lot and looking to lessen the expense if possible.
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Old 07-18-2007, 08:33 PM
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hraney hraney is offline
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When I had my NV5000 overhauled several years ago I was told the synchronizers were nylon and would not hold up w/o the GM fluid. I had some synthetic fluid we used in our OTR truck but the numbers didn't quite match up. I bit the bullet and got the GM fluid to preserve the warranty. On something like the tranny that is going to take quite a bit of abuse, I'd think it would be cheaper in the long run not to skimp on the fluid.
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Old 07-19-2007, 04:45 PM
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TAZZ9963 TAZZ9963 is offline
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I use AMSOIL for all my fluids in the truck and I am very happy with my choice.

http://www.amsoil.com/StoreFront/mtg.aspx
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Old 09-12-2007, 08:15 PM
sootjunkie65 sootjunkie65 is offline
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Default tranny fluid

I still like royal purple fluids- theyre expensive around 11 bucks a quart but you get really smooth shifts plus it has the additive in it that the tranny requires
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Old 09-13-2007, 01:08 AM
triplebr1 triplebr1 is offline
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i agree with the royal purple, that is what i put in my nv4500, afer it was rebuilt, i love it it shifts smooth, and i have royal purple in evey other gear box too, also if you spend the money now you will not have to change it for a long time so just a thought
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Old 09-19-2007, 03:12 PM
Craig Craig is offline
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The the tranny fluid is a special lube to take the pounding the diesel engine hammers through the drivetrain. It helps obsorb the impact of the high torq low rpm pulses this engine dishes out. My Manual recomends the GM or Castrol product. I have never seen the exact Castrol product on the shelf. My friend with the same tranny in his Dodge could only find it at his Dodge Dealer. I like other brand product (I used to sell Royal Purple products, good stuff), but in this application, personally, I would only use what the manual says.
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  #7  
Old 09-20-2007, 05:22 PM
synthetic-oil synthetic-oil is offline
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Default 5 speed trans fluid recommendation

Try AMSOIL. NV3500 is amsoil part # MTFQT and it is 6.60 a qt, and the NV4500 is amsoil part # MTGQT for $9.90 a qt
www.syntheticoils.us

Jeff
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Old 09-30-2007, 06:25 AM
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grvrjr grvrjr is offline
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I think royal purple is the best choice also. Amsoil & Redline also make very good synthetic trans. oils also but royal purple in my area is the easiest to find. But any one of these brands will work just fine.
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  #9  
Old 11-24-2007, 09:51 PM
GM Guy GM Guy is offline
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On PTO Cover, there should be a decal listing GM and Dodge oil part numbers. We have a Chevy/ Dodge dealer close by, and they only carry the Dodge oil @ $15/qt. don't carry the GM oil because it's about $22/qt and is the same stuff.

We personally use Royal Purple. On Royal Purple Web site, there is a comparison chart. GM PN 12346190 is equivalent to Royal Purple Max-Gear 75w90.

On your V-6 5spd 1500, the fluid is thinner, the Royal Purple equivalent is Sychromax
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99 Chev C3500 6.5L NV4500 14 bolt 2wd 4.10 130K
96 GMC C2500HD 6.5L NV4500 14 bolt 2wd 3.73 240K
95 GMC C2500HD 6.5L NV4500 14 bolt 2wd 4.10 135K
95 Chev C3500HD 6.5L NV4500 D80 2wd 5.13 132K
94 GMC C2500HD Burb 6.5L 4L80E 14 bolt 2wd 3.73 300K
91 GMC C1500, 6.2L SM465 10 bolt 2wd 3.42 59K
91 Chev C1500 4.3L 5LM60 10 bolt 2wd 3.42 ??K

See other forum for complete signature

Last edited by GM Guy; 11-24-2007 at 10:18 PM.
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