Do I have a limited slip differential?

84K30

Full Access Member
Joined
Jul 14, 2019
Posts
151
Reaction score
57
Location
SWPA
First Name
Eric
Truck Year
1984
Truck Model
K30
Engine Size
454
Opened up the rear axle today for a fluid change and to confirm my axle ratio. Ring gear has 41 teeth & the pinion gear has 10. This matches my RPO codes on the sticker under the hood. My RPO codes also indicate that I have a locking differential but I don’t see the usual spring etc. that are in a limited slip diff.

You must be registered for see images attach


You must be registered for see images attach
 

TubeTruck

I'm from Boston. Deal with it.
Joined
Sep 4, 2019
Posts
1,388
Reaction score
1,941
Location
Northern IL
First Name
Denis
Truck Year
1978
Truck Model
Suburban K10
Engine Size
LQ9
Probably a Gov lock. The 14 bolt carriers are really hard to see inside.
 

nvrenuf

Full Access Member
Joined
Jul 30, 2010
Posts
914
Reaction score
438
Location
Mobile, Al.
First Name
John
Truck Year
1991
Truck Model
K5
Engine Size
454
Yes, that is a GM Gov Lock diff (RPO = G80). The 10.5" 14 bolt Gov Lock is identifiable by the 2 round cutouts that are close together (just to the right of the ring gear in the pic), this diff does not have visible springs for ID.
 

dvdswan

Full Access Member
Joined
Mar 11, 2014
Posts
1,797
Reaction score
1,266
Location
Port Orchard, WA
First Name
Dave
Truck Year
1978
Truck Model
K10
Engine Size
350
14 bolt FF (10 1/2" ring gear) the carrier splits in half to access the internals. 14 bolt SF (9 1/2" ring gear) is like most other carriers that you can see the spider gears and/or springs.



#18 is the carrier, 12-16 are the spiders and/or springs depending on the LSD or open carrier.

You must be registered for see images attach
 

1987 GMC Jimmy

Automobile Hoarder
Joined
Jan 23, 2016
Posts
5,841
Reaction score
2,344
Location
Mississippi
First Name
Jesse
Truck Year
1987
Truck Model
V1500 Jimmy
Engine Size
350
I guess we both learned something. I would have assumed it was open since the spring’s not right there like in the Corp 10 rear.
 

Forum statistics

Threads
34,127
Posts
709,779
Members
22,190
Latest member
Ckfinn2020
Top