Auto To Manual Trans What Do I Need?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gearheadmike · 03-24-2014, 01:47 PM

Ok I got a 1986 gmc Sierra k2500 350 700r4 trans np208 transfercase 8ft box 4x4.
I would like to switch it over to a manual 5speed with hydrolic slave cylinder.
I'm just not sure I what truck I should look for for this swap? And what transmission/t-case and crossmember I would need?

csdineley · 03-24-2014, 02:40 PM

For a 5 speed. Your two main options are the nv3500 from an S-10 or 1/2 ton. Or the nv4500 from a 3/4 or 1 ton. Both from the 90's

gearheadmike · 03-24-2014, 02:46 PM

I'd rather go nv4500 or if I have to go 4speed I will.

**hatzie** · 03-24-2014, 02:52 PM

1985-91 CK RV have hydraulic clutch pedals.
The 85-91 CK RV cabs have dimples on the firewall for the Clutch master cylinder. Prior to that you'll need to improvise.

You can adapt or buy a mechanical clutch bellhousing for the NV4500 but it's not as easy as adapting the cab to a hydraulic clutch pedal setup.

csdineley · 03-24-2014, 02:57 PM

I swapped from a th400 to the sm465. I like it. As long as I don't have to drive in busy traffic.

03-24-2014, 01:47 PM	#1
gearheadmike Registered User Join Date: Mar 2014 Location: West chazy ny Posts: 2	Auto To Manual Trans What Do I Need?? Ok I got a 1986 gmc Sierra k2500 350 700r4 trans np208 transfercase 8ft box 4x4. I would like to switch it over to a manual 5speed with hydrolic slave cylinder. I'm just not sure I what truck I should look for for this swap? And what transmission/t-case and crossmember I would need?

03-24-2014, 02:40 PM	#2
csdineley Registered User Join Date: Feb 2012 Location: Morgantown, Wv Posts: 294	Re: Auto To Manual Trans What Do I Need?? For a 5 speed. Your two main options are the nv3500 from an S-10 or 1/2 ton. Or the nv4500 from a 3/4 or 1 ton. Both from the 90's __________________ 87 V20, Vortec 350, Sm465, Np205, Dana 44, 14bff 4.10's

03-24-2014, 02:46 PM	#3
gearheadmike Registered User Join Date: Mar 2014 Location: West chazy ny Posts: 2	Re: Auto To Manual Trans What Do I Need?? I'd rather go nv4500 or if I have to go 4speed I will.

03-24-2014, 02:52 PM	#4
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,941	Re: Auto To Manual Trans What Do I Need?? 1985-91 CK RV have hydraulic clutch pedals. The 85-91 CK RV cabs have dimples on the firewall for the Clutch master cylinder. Prior to that you'll need to improvise. You can adapt or buy a mechanical clutch bellhousing for the NV4500 but it's not as easy as adapting the cab to a hydraulic clutch pedal setup. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

03-24-2014, 02:57 PM	#5
csdineley Registered User Join Date: Feb 2012 Location: Morgantown, Wv Posts: 294	Re: Auto To Manual Trans What Do I Need?? I swapped from a th400 to the sm465. I like it. As long as I don't have to drive in busy traffic. __________________ 87 V20, Vortec 350, Sm465, Np205, Dana 44, 14bff 4.10's



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