SM465 what kind of oil and how much - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GmtGmt · 03-09-2010, 02:03 PM

what kind of grade should i use on my SM465 4 Speed? and how much?

Thanks Thomas

**MJN** · 03-09-2010, 02:41 PM

80w90 conventional or 75w90 synthetic. Not sure on the amount, I just pump it from a bucket until it's full.

GmtGmt · 03-09-2010, 02:48 PM

Quote:

Originally Posted by MJN

80w90 conventional or 75w90 synthetic. Not sure on the amount, I just pump it from a bucket until it's full.

so till its running out of the filler hole?

leegrady · 03-09-2010, 05:15 PM

That's right. When the gear oil starts to come out from the fill hole screw the plug back end.

________________________

Bone stock '81 GMC K2500 long bed/350/sm465/corp 14bolt and dana 60upfrt.

**MJN** · 03-09-2010, 08:11 PM

yup, my factory manual doesn't specify an amount, just to add until level is at filler hole.

bikes&bowties · 03-09-2010, 08:19 PM

One of my manuals didnt specify an ammount and the other said 4 quarts. I also found 4 quarts on the net... I put 5 in and it wasnt quite to the filler whole. I tried to get it as level as possible with little effort though so that may have been the reason...

MTCK · 03-09-2010, 10:06 PM

I noticed less noise and much smoother shifting when I put Mobile 1 75w90 in. The stuff that came out that the PO had used looked like it might have been original so who knows if the improved performance is from the full synthetic or just new oil.

GmtGmt · 03-11-2010, 07:06 AM

i put Mobilelube 75w90 in its full synthetic i got it cheap at work

03-09-2010, 02:41 PM	#2
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 3,008	Re: SM465 what kind of oil and how much 80w90 conventional or 75w90 synthetic. Not sure on the amount, I just pump it from a bucket until it's full. __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

03-09-2010, 05:15 PM	#4
leegrady Registered User Join Date: Mar 2010 Location: Lyle, MN Posts: 60	Re: SM465 what kind of oil and how much That's right. When the gear oil starts to come out from the fill hole screw the plug back end. ________________________ Bone stock '81 GMC K2500 long bed/350/sm465/corp 14bolt and dana 60upfrt.

03-09-2010, 08:11 PM	#5
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 3,008	Re: SM465 what kind of oil and how much yup, my factory manual doesn't specify an amount, just to add until level is at filler hole. __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

03-09-2010, 08:19 PM	#6
bikes&bowties Registered User Join Date: May 2009 Location: Washington Posts: 663	Re: SM465 what kind of oil and how much One of my manuals didnt specify an ammount and the other said 4 quarts. I also found 4 quarts on the net... I put 5 in and it wasnt quite to the filler whole. I tried to get it as level as possible with little effort though so that may have been the reason...

03-09-2010, 10:06 PM	#7
MTCK Registered User Join Date: Dec 2009 Location: Fairbanks, AK Posts: 1,830	Re: SM465 what kind of oil and how much I noticed less noise and much smoother shifting when I put Mobile 1 75w90 in. The stuff that came out that the PO had used looked like it might have been original so who knows if the improved performance is from the full synthetic or just new oil. __________________ -Marcus 1991 V3500 L29 454 4L80E NP205 D60/14 Bolt 4.56's 1984 K30 292 TH400 NP205 D60/14 Bolt 4.56's flat bed 7'6" Meyer Plow 2022 Silverado 3500 L8T Project Daily Driver Project Heavy Hauler Project Plow Truck



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