Oil for 71 C20 4sp & Dana 60 + Org NoSpin Doc pics - The 1947 - Present Chevrolet & GMC Truck Message Board Network

andymarkv · 08-24-2010, 05:01 PM

I went to do a rear brake job on the 71 C20 and the fluid that came out looked like mud!!!!
What are you guys running for weights and brands for 71 dana 60's with No Spin Detroit lockers? I believe with the Detroit there is no need for friction modifier. I assume you refill to the plug height on the cover.

Also, what is the correct oil for the 4sp trans in the same truck.
I am assuming the top pipe plug is the fill and the bottom the drain.
Do I refill to the fill hole or is there a specific amount of gear oil that goes back in?

Also I found all of the original NoSpin documents in the glovebox! Is that cool or what!

Wrenchbender Ret · 08-24-2010, 06:20 PM

Use 90 weight gear oil GL-5 in both of them. There are a lot of multiple weight gear lubs now. 75W90 80w90 85w140. Any will work as long as it covers 90. Each unit will hold about 6 pint's. You fill it to the level of the fill plug. There probably is no drain on the rear end but you can drain it out of the lower bolt holes of the cover or pull the cover. Fill the rear through the plug in the cover. Do not disturb the ring gear thrust adjustment.

**68 Stepside** · 08-24-2010, 07:58 PM

I'd do the same, GL-5, but that's just me. I would recommend staying away from 85w140 in the transmission, especially in upstate NY, would NOT be fun to shift when cold.

ERASER5 · 08-24-2010, 09:18 PM

The Dana 60 does need limited slip additive. My had a tag bolted to it stating that. The longer tag. The short tag was the ratio. I believe it has both drain and fill plugs.

Oh, and flush that brake fluid.

andymarkv · 08-24-2010, 10:26 PM

I now realize I do NOT have a dana 60...... Obviously I haven't done enough homework on this truck. All of the dana 60/70 pictures don't look like what I have!

I will search it out tomorrow. Must be something pretty common.

Sinister · 08-24-2010, 10:38 PM

That's an Eaton HO 52.

ERASER5 · 08-24-2010, 10:45 PM

That is an Eaton HO52 (72 if it were a 1 ton). Different animal from the D60. The Eaton was very good diff. too bad it was discontinued. Many say that it is every bit as good as GM 14 bolt. Drop out diff, removable inspection cover, strong, slim lines, what's not to love? Too bad a 4.10 is the highest gear available.

coloradosean2009 · 08-24-2010, 10:46 PM

and by the looks of your spring pack.... one back breaking ride. I feel your pain

ERASER5 · 08-24-2010, 10:50 PM

Quote:

Originally Posted by coloradosean2009

and by the looks of your spring pack.... one back breaking ride. I feel your pain

?? It only has 6 leaves. 1/2 ton 4X4s have that many.

andymarkv · 08-25-2010, 08:19 AM

Thanks guys!!! This board is the best! I had never heard of that rear before.

As I've mentioned in my other thread;
http://67-72chevytrucks.com/vboard/s....php?p=4141857
I'm doing this for a friend who wants to continue to use it in his orchard. He told me he does LOAD it with 2500-2700lbs, so the springs probably ride a little better then!!

The truck is really coming along and I hope to have the rear brakes rebuilt tonight. I'm going to drain the mud out of the rear and refill it. I may have to drive it a little and drain it again. The stuff that's in there is quite nasty. I'm sure the trans isn't much better!

cdowns · 08-25-2010, 11:35 AM

synthetic is worth the few extra dolla

RichardJ · 08-25-2010, 12:33 PM

I would try to find a GL-4 for the transmission. Gl-5 has additives that wear the brass syncro rings out faster. The Gl-5 is great for gears and bearings and is OK for the newer transmissions.
If it says GL-4 and GL-5 on the container it is GL-5.

Do a web search and you will find that there is a lot of debate about Gl-4 and GL-5 in old transmisssions.
I think the consensus is that if the trans called for GL-4, you should use that.

andymarkv · 08-25-2010, 02:19 PM

Thanks!!! I was going to buy gear oil tonight!

Only problem is I thought almost everything is GL5 at this point. I will see what I can find.

RichardJ · 08-25-2010, 04:28 PM

The only brand of GL-4 that I have been able to find anymore is Sta-Lube. Their packaging makes their products look cheap, but they have been around for decades. I would much rather use Valvoline which I have used for rear ends.
If you find a Gl-4 product other than Sta-Lube I would like to hear about it.

andymarkv · 08-26-2010, 08:51 AM

Where are you buying your Sta-lube?

All I could find local was GL-5, but I will swap it out when I find something else.

What about Pennzoil synchromesh? It is supposed to be OK for yellow metals.
But it doesn't list the weight. I'm afraid it would be too thin.
http://www.pennzoil.com/#/transmissi...smission-fluid

08-24-2010, 05:01 PM	#1
andymarkv Registered User Join Date: Jun 2010 Location: Upstate NY Posts: 66	Oil for 71 C20 4sp & Eaton HO52+Original NoSpin Doc pics I went to do a rear brake job on the 71 C20 and the fluid that came out looked like mud!!!! What are you guys running for weights and brands for 71 dana 60's with No Spin Detroit lockers? I believe with the Detroit there is no need for friction modifier. I assume you refill to the plug height on the cover. Also, what is the correct oil for the 4sp trans in the same truck. I am assuming the top pipe plug is the fill and the bottom the drain. Do I refill to the fill hole or is there a specific amount of gear oil that goes back in? Also I found all of the original NoSpin documents in the glovebox! Is that cool or what! Last edited by andymarkv; 08-25-2010 at 08:22 AM.

08-24-2010, 06:20 PM	#2
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,229	Re: Oil for 71 C20 4sp & Dana 60 + Org NoSpin Doc pics Use 90 weight gear oil GL-5 in both of them. There are a lot of multiple weight gear lubs now. 75W90 80w90 85w140. Any will work as long as it covers 90. Each unit will hold about 6 pint's. You fill it to the level of the fill plug. There probably is no drain on the rear end but you can drain it out of the lower bolt holes of the cover or pull the cover. Fill the rear through the plug in the cover. Do not disturb the ring gear thrust adjustment.

08-24-2010, 07:58 PM	#3
68 Stepside huh? Join Date: May 2000 Location: Washington, Illinois Posts: 5,690	Re: Oil for 71 C20 4sp & Dana 60 + Org NoSpin Doc pics I'd do the same, GL-5, but that's just me. I would recommend staying away from 85w140 in the transmission, especially in upstate NY, would NOT be fun to shift when cold. __________________ Someday when I'm lonely, Wishing you weren't so far away, Then I will remember Things we said today. RIP El Jay

08-24-2010, 09:18 PM	#4
ERASER5 Registered User Join Date: Jun 2006 Location: Indiana Posts: 4,859	Re: Oil for 71 C20 4sp & Dana 60 + Org NoSpin Doc pics The Dana 60 does need limited slip additive. My had a tag bolted to it stating that. The longer tag. The short tag was the ratio. I believe it has both drain and fill plugs. Oh, and flush that brake fluid. __________________ '70 GMC C1500 LWB Power disc brakes. WooHoo! Posi 6 Lug Dana 60

08-24-2010, 10:26 PM	#5
andymarkv Registered User Join Date: Jun 2010 Location: Upstate NY Posts: 66	Re: Oil for 71 C20 4sp & Dana 60 + Org NoSpin Doc pics I now realize I do NOT have a dana 60...... Obviously I haven't done enough homework on this truck. All of the dana 60/70 pictures don't look like what I have! I will search it out tomorrow. Must be something pretty common.

08-24-2010, 10:38 PM	#6
Sinister Between Trucks... Join Date: Mar 2002 Location: Los Angeles, CA. Posts: 3,830	Re: Oil for 71 C20 4sp & Dana 60 + Org NoSpin Doc pics That's an Eaton HO 52. __________________ Beat it to fit, Paint it to match...

08-24-2010, 10:45 PM	#7
ERASER5 Registered User Join Date: Jun 2006 Location: Indiana Posts: 4,859	Re: Oil for 71 C20 4sp & Dana 60 + Org NoSpin Doc pics That is an Eaton HO52 (72 if it were a 1 ton). Different animal from the D60. The Eaton was very good diff. too bad it was discontinued. Many say that it is every bit as good as GM 14 bolt. Drop out diff, removable inspection cover, strong, slim lines, what's not to love? Too bad a 4.10 is the highest gear available. __________________ '70 GMC C1500 LWB Power disc brakes. WooHoo! Posi 6 Lug Dana 60

08-24-2010, 10:46 PM	#8
coloradosean2009 Registered User Join Date: Aug 2009 Location: Denver, CO Posts: 291	Re: Oil for 71 C20 4sp & Dana 60 + Org NoSpin Doc pics and by the looks of your spring pack.... one back breaking ride. I feel your pain __________________ __________________________________________ Sean 1972 C20 2005 4Runner

08-25-2010, 08:19 AM	#10
andymarkv Registered User Join Date: Jun 2010 Location: Upstate NY Posts: 66	Re: Oil for 71 C20 4sp & Dana 60 + Org NoSpin Doc pics Thanks guys!!! This board is the best! I had never heard of that rear before. As I've mentioned in my other thread; http://67-72chevytrucks.com/vboard/s....php?p=4141857 I'm doing this for a friend who wants to continue to use it in his orchard. He told me he does LOAD it with 2500-2700lbs, so the springs probably ride a little better then!! The truck is really coming along and I hope to have the rear brakes rebuilt tonight. I'm going to drain the mud out of the rear and refill it. I may have to drive it a little and drain it again. The stuff that's in there is quite nasty. I'm sure the trans isn't much better! Last edited by andymarkv; 08-25-2010 at 08:24 AM.

08-25-2010, 11:35 AM	#11
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Oil for 71 C20 4sp & Dana 60 + Org NoSpin Doc pics synthetic is worth the few extra dolla __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

08-25-2010, 12:33 PM	#12
RichardJ Registered User Join Date: Apr 2010 Location: So Cal Posts: 1,466	Re: Oil for 71 C20 4sp & Dana 60 + Org NoSpin Doc pics I would try to find a GL-4 for the transmission. Gl-5 has additives that wear the brass syncro rings out faster. The Gl-5 is great for gears and bearings and is OK for the newer transmissions. If it says GL-4 and GL-5 on the container it is GL-5. Do a web search and you will find that there is a lot of debate about Gl-4 and GL-5 in old transmisssions. I think the consensus is that if the trans called for GL-4, you should use that. __________________ '67 GMC 2500, 292, 4spd, AC

08-25-2010, 02:19 PM	#13
andymarkv Registered User Join Date: Jun 2010 Location: Upstate NY Posts: 66	Re: Oil for 71 C20 4sp & Dana 60 + Org NoSpin Doc pics Thanks!!! I was going to buy gear oil tonight! Only problem is I thought almost everything is GL5 at this point. I will see what I can find.

08-25-2010, 04:28 PM	#14
RichardJ Registered User Join Date: Apr 2010 Location: So Cal Posts: 1,466	Re: Oil for 71 C20 4sp & Dana 60 + Org NoSpin Doc pics The only brand of GL-4 that I have been able to find anymore is Sta-Lube. Their packaging makes their products look cheap, but they have been around for decades. I would much rather use Valvoline which I have used for rear ends. If you find a Gl-4 product other than Sta-Lube I would like to hear about it. __________________ '67 GMC 2500, 292, 4spd, AC

08-26-2010, 08:51 AM	#15
andymarkv Registered User Join Date: Jun 2010 Location: Upstate NY Posts: 66	Re: Oil for 71 C20 4sp & Dana 60 + Org NoSpin Doc pics Where are you buying your Sta-lube? All I could find local was GL-5, but I will swap it out when I find something else. What about Pennzoil synchromesh? It is supposed to be OK for yellow metals. But it doesn't list the weight. I'm afraid it would be too thin. http://www.pennzoil.com/#/transmissi...smission-fluid



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