The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - SM465 4 speed manual- removing speedo gear drive

jdaley · 05-12-2020, 03:21 AM

My 1976 C20 has stripped the speedo drive gear in the gear box. I cannot work out what spanner size is needed to get the 'body' of the drive gear off the gear box. It is something like 1 1/8 inch or 28mm AF, but the engagement edge of the nut is about 3mm.
It may actually be called, 'speedometer drive adaptor nut"
Has anybody had experience with this please?
Thanks in advance.

05-12-2020, 03:21 AM	#1
jdaley Registered User Join Date: Dec 2009 Location: Melbourne, Australia Posts: 71	SM465 4 speed manual- removing speedo gear drive My 1976 C20 has stripped the speedo drive gear in the gear box. I cannot work out what spanner size is needed to get the 'body' of the drive gear off the gear box. It is something like 1 1/8 inch or 28mm AF, but the engagement edge of the nut is about 3mm. It may actually be called, 'speedometer drive adaptor nut" Has anybody had experience with this please? Thanks in advance. __________________ John Daley Melbourne, Australia 1946 Chev Ute 1977 Chev Tray Road racing sidecars Last edited by jdaley; 05-12-2020 at 05:14 AM.