OPTION QUESTIONS?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CARS4567 · 05-14-2002, 09:17 AM

FROM GLOVE BOX SHEET:
1971 3/4 2wd...
1) G86-NO SPIN REAR AXLE
2) M20-4spd TRANS
DOES THAT MEAN JUST A LIMITED-SLIP AND A REGULAR GRANNY LOW 4spd?

jku72 · 05-14-2002, 09:37 AM

A no spin is not a limited slip, but is similar in a broad sense. A no spin allows no spin, whereas a limited slip allows some slip.
The tranny is a granny.

ckhd · 05-14-2002, 10:53 AM

G86 No-Spin is basically a detroit locker. Hard to explain, but the slower wheel gets the power, i.e., in a turn, the inside wheel drives the pickup, and the outside coasts, but if the inside slipped (ice or something), then the locker would put power to the outside. The way I understand detroit lockers in my head is like you have two ratchets hooked to the axles. The ratchets spin at the same time, but you could spin the axle faster than the ratchet (as the outside wheel in a turn would do), and it would click the gears in the ratchet and spin faster. The inside wheel wouldn't be spinning faster than the ratchet, so the ratchet would drive it.

Probably doesn't make sense, but it works for me.

The M20 transmission is the CH465 Chevy 4-speed with granny low (I'm pretty sure).

------------------
Bowen
'68 K20 fleet
'69 K10 swb fleet
'72 C10 lwb step
'72 K10 Suburban

*Fast68Chevy* · 05-14-2002, 12:06 PM

M20 is SM420 if the truck is a 67 or older, otherwise is the Ch465.

05-14-2002, 09:17 AM	#1
CARS4567 Registered User Join Date: Jan 2002 Location: SEATTLE, WA Posts: 338	OPTION QUESTIONS?? FROM GLOVE BOX SHEET: 1971 3/4 2wd... 1) G86-NO SPIN REAR AXLE 2) M20-4spd TRANS DOES THAT MEAN JUST A LIMITED-SLIP AND A REGULAR GRANNY LOW 4spd?

05-14-2002, 09:37 AM	#2
jku72 Registered User Join Date: Jan 2002 Location: cornville, maine Posts: 659	A no spin is not a limited slip, but is similar in a broad sense. A no spin allows no spin, whereas a limited slip allows some slip. The tranny is a granny. __________________ jku Cornville, Maine 68 C10 burb 42 Willys MB 46 Dodge WF-32 1.5 ton 53 & 56 Olds' 60 Cadillac 22 Dodge Brothers

05-14-2002, 10:53 AM	#3
ckhd Registered User Join Date: Oct 2000 Location: St. Johns, Arizona Posts: 2,660	G86 No-Spin is basically a detroit locker. Hard to explain, but the slower wheel gets the power, i.e., in a turn, the inside wheel drives the pickup, and the outside coasts, but if the inside slipped (ice or something), then the locker would put power to the outside. The way I understand detroit lockers in my head is like you have two ratchets hooked to the axles. The ratchets spin at the same time, but you could spin the axle faster than the ratchet (as the outside wheel in a turn would do), and it would click the gears in the ratchet and spin faster. The inside wheel wouldn't be spinning faster than the ratchet, so the ratchet would drive it. Probably doesn't make sense, but it works for me. The M20 transmission is the CH465 Chevy 4-speed with granny low (I'm pretty sure). ------------------ Bowen '68 K20 fleet '69 K10 swb fleet '72 C10 lwb step '72 K10 Suburban __________________ my 2¢ - t.i.o.l.i. Bowen 1968 K20 fleet 1969 K10 swb fleet 1972 K10 Suburban 1972 C10 lwb step 1992 K1500 'burb 1995 K2500 'burb 1997 C1500 'burb 1999 K1500 2000 K1500 'burb Why do I own so many Suburbans?

05-14-2002, 12:06 PM	#4
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	M20 is SM420 if the truck is a 67 or older, otherwise is the Ch465.



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