Rear diff drain - Page 2 - ZR-1 Net Registry Forums

Paul Workman · 01-16-2018

FWIW, I put a wrap of Teflon plumbers tape on the plug to keep it from seizing.

efnfast · 01-16-2018

Thanks for all the input. It's on my list of things to do.

WARP TEN · 01-16-2018

Marc H does these regularly and might have tips for you if you give him a call. --Bob

jss06c6 · 01-16-2018

Simple job, makes fluid change a breeze..

Sent from my XT1585 using ZR-1 Net Registry mobile app

efnfast · 01-17-2018

Severe duty, every 50,000. How often so you guys change it?

RussMcB · 01-17-2018

Quote:

Originally Posted by efnfast

Severe duty, every 50,000. How often so you guys change it?

Not often, but it was a little peace of mind to drain it and put in new, known fluid.

efnfast · 03-03-2018

Done.

Hib Halverson · 03-04-2018

When I owned my 95, right after I first met Marc H., he told me about drilling the back of the drive axle housing for a drain plug. I think the exact measurements for the positioning of the hole are on his web site.

Never worried about chips because they all came out with the old lube.

In that car, like all my other drive axles, I used Red Line Heavy Shockproof Gear Lubricant.

I'd change it ever 36,000-40,000 miles or every 3-4 years.

efnfast · 03-04-2018

Filled it with Amsoil 75W-90 with a little friction modifier. Pretty pleased with the results.

TX '90 ZR1 · 03-04-2018

I am changing my fluids in the next few days. Might as well do the diff. drain while I am there.
Does anyone have the exact placement of the plug in the housing? I have the drill & tap so don't really need to order the kit. Also, checked Marc's site, but was unable to find the info if it is there.
Thanks in advance.

01-16-2018	#11
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Re: Rear diff drain FWIW, I put a wrap of Teflon plumbers tape on the plug to keep it from seizing. __________________ Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry

01-16-2018	#12
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,302	Re: Rear diff drain Thanks for all the input. It's on my list of things to do.

01-16-2018	#13
WARP TEN Join Date: Apr 2007 Location: Lake Bluff, IL Posts: 2,050	Re: Rear diff drain Marc H does these regularly and might have tips for you if you give him a call. --Bob __________________ 2016 Long Beach Red Z06 #10281 "POPS Z" 1995 Polo Green #409 "WARP TEN"--Haibeck 350/510 package, 4.10s, Hurst, Stock Exhaust with QTP Cutouts --Sold but still running strong 1993 Quasar Blue #161 "HIL KING" --Sold but still running strong, now with more than 120,000 miles 1967 Marlboro Maroon/Saddle Corvette Coupe 300 hp/4-spd --Sold a long time ago ZR-1 Net Registry Founding Member #95 NCM Lifetime Member Favorite Quote--Attributed to Mickey Thompson: "Too Much Horsepower is Almost Enough"

01-16-2018	#14
jss06c6 Join Date: Aug 2015 Location: Magnolia, Texas Posts: 884	Re: Rear diff drain Simple job, makes fluid change a breeze.. Sent from my XT1585 using ZR-1 Net Registry mobile app

01-17-2018	#15
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,302	Re: Rear diff drain Severe duty, every 50,000. How often so you guys change it?

03-03-2018	#17
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,302	Re: Rear diff drain Done.

03-04-2018	#18
Hib Halverson Join Date: Jun 2005 Location: CenCoast California Posts: 899	Re: Rear diff drain When I owned my 95, right after I first met Marc H., he told me about drilling the back of the drive axle housing for a drain plug. I think the exact measurements for the positioning of the hole are on his web site. Never worried about chips because they all came out with the old lube. In that car, like all my other drive axles, I used Red Line Heavy Shockproof Gear Lubricant. I'd change it ever 36,000-40,000 miles or every 3-4 years.

03-04-2018	#19
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,302	Re: Rear diff drain Filled it with Amsoil 75W-90 with a little friction modifier. Pretty pleased with the results.

03-04-2018	#20
TX '90 ZR1 Join Date: Oct 2017 Location: TX Posts: 1,973	Re: Rear diff drain I am changing my fluids in the next few days. Might as well do the diff. drain while I am there. Does anyone have the exact placement of the plug in the housing? I have the drill & tap so don't really need to order the kit. Also, checked Marc's site, but was unable to find the info if it is there. Thanks in advance. __________________ Kenny 1990 #442