what transmission do I have? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

nikwho · 10-05-2010, 01:26 AM

I have an '83 K10 with a standard four speed(Granny gear plus three), does anyone know what transmission this is? Thanks, Nik

b454rat · 10-05-2010, 07:26 AM

Sm-465

66_k10_manny · 10-10-2010, 11:16 AM

is that the same tranny that i have in my 66 k10? its also a 4 speed with granny. Is it also called a munsi?

82swampthing · 10-10-2010, 12:15 PM

the one in your 66 is the sm420 and yeah its also made by muncie.

Davetopay · 10-10-2010, 02:42 PM

Quote:

Originally Posted by b454rat

Sm-465

Yup. AKA one of the best truck trannys ever made.

66_k10_manny · 10-11-2010, 05:51 PM

When Im driving my truck and I want to shift from 3rd to 4th, I have to wait until the rpm's drop down to at least 3000. If I try and engage 4th gear any sooner, it grinds. Is that a problem in the tranny or the clutch?

raycow · 10-11-2010, 10:12 PM

Quote:

Originally Posted by 66_k10_manny

When Im driving my truck and I want to shift from 3rd to 4th, I have to wait until the rpm's drop down to at least 3000. If I try and engage 4th gear any sooner, it grinds. Is that a problem in the tranny or the clutch?

Could be either. Here is how to tell which. Have the truck at a standstill with the engine idling in neutral. Push in the clutch, wait about 5 seconds, and shift to reverse. Does it grind going into reverse? If yes, your clutch is not disengaging fully. If no, your 4th gear synchro is going out.

Ray

10-05-2010, 01:26 AM	#1
nikwho Registered User Join Date: Apr 2010 Location: Flagstaff, AZ Posts: 974	what transmission do I have? I have an '83 K10 with a standard four speed(Granny gear plus three), does anyone know what transmission this is? Thanks, Nik __________________ '59 Apache - 383" SBC/TH-350 '68 GMC - BBC/TH400

10-05-2010, 07:26 AM	#2
b454rat Senior Member Join Date: May 2004 Location: Binghamton, NY Posts: 3,454	Re: what transmission do I have? Sm-465 __________________ 2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 6” lift 1999 GMC Yukon 350/4L60 4" SAS

10-10-2010, 11:16 AM	#3
66_k10_manny Registered User Join Date: Apr 2010 Location: san jose, ca Posts: 86	Re: what transmission do I have? is that the same tranny that i have in my 66 k10? its also a 4 speed with granny. Is it also called a munsi?

10-10-2010, 12:15 PM	#4
82swampthing Registered User Join Date: Aug 2009 Location: taxachusetts Posts: 138	Re: what transmission do I have? the one in your 66 is the sm420 and yeah its also made by muncie. __________________ R.I.P gm 1908-1986 1982 chevy k20,350,sm465,np205,10bolt and 14bolt s.f

10-11-2010, 05:51 PM	#6
66_k10_manny Registered User Join Date: Apr 2010 Location: san jose, ca Posts: 86	Re: what transmission do I have? When Im driving my truck and I want to shift from 3rd to 4th, I have to wait until the rpm's drop down to at least 3000. If I try and engage 4th gear any sooner, it grinds. Is that a problem in the tranny or the clutch?



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