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**hatzie** · 09-22-2018, 08:38 AM

Full time 4x4 is the NP203 transfer case. If the transmission is original it's either a TH350 or TH400. The TH700R4 is a 4 speed auto that was first available from the early 80's on.

You can buy that metal driven gear for the NP203. They aren't pricey. Yours looks like it's been recovered from the bottom of the ocean.
Check the plastic helical drive gear on the transfer case output shaft to make sure it's not stripped.

Do you have cruise control?
The break in the end of the driven gear makes me think you may have a very tight or seized speedo cable or a seized or siezing up Cruisemaster transducer... or the gears in the ratio adapter are worn and bind up.

09-22-2018, 08:38 AM	#7
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,916	Re: speedometer reducer/gear question Full time 4x4 is the NP203 transfer case. If the transmission is original it's either a TH350 or TH400. The TH700R4 is a 4 speed auto that was first available from the early 80's on. You can buy that metal driven gear for the NP203. They aren't pricey. Yours looks like it's been recovered from the bottom of the ocean. Check the plastic helical drive gear on the transfer case output shaft to make sure it's not stripped. Do you have cruise control? The break in the end of the driven gear makes me think you may have a very tight or seized speedo cable or a seized or siezing up Cruisemaster transducer... or the gears in the ratio adapter are worn and bind up. __________________ 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. Last edited by hatzie; 09-22-2018 at 08:49 AM.