I just purchased my first harley 3 weeks ago, a 2007Road King Customand during my 1000 mile serviceI'm leaning towards synthetic Amsoil20W50 for the engine anda synthetic 75W140 for the tranny. Being involved with heavy truck maintenance for years, I'm not sure why folks are going with the Redline Heavy Shockproof, which from what i found is a 75W/250 weight. I've never put anything that thick in a heavy truck tranny or rear application before and wonder if it's too heavy for a bike tranny.Won't the heavier gearoil in the tranny causetheengine to work harder, producing less fuelmileage?Granted as the operating temps increase, the oil will thin out a bit, but it still will be thicker than a 75W/140.I live in south florida and would like to know what others are thinkingby using theheavy shockproof in their machines. I do understand that some people are using this heavier gear oil to quiet their 5th gear issue. I also see that Amsoil makes a 75W/110 gear oil along with the 75W/90 and 75W/140. Is anyone using the in between 110 gear oil? Any advice would be appreciated.

 

I replied to your question in the other thread. Short answer, NO , it is nOT too heavy.

Where in S. Fl., I spend alot of time in Naples/Marco Is. area.

EZ











ShockProof™ Gear Oil


A unique lubricant containing a suspension of solid microscopic particles as an extreme pressure agent--unique solid dispersion which cushions gear teeth to help prevent tooth breakage and allows the use of lower viscosities. The viscosity characteristics allow the lubricant to resist throwoff and provide a film thickness greater than an SAE 250 grade, with the same low fluid friction as with our 80W140. Recommended for heavily-loaded racing differentials and transmissions, Off Road racing and problem gearboxes. Offers a "best of both worlds" balance of relatively low drag and the utmost in protection.















80W Motorcycle Gear Oil with ShockProof

SuperLight ShockProof™

LightWeight ShockProof™

Heavy ShockProof™




Heavy ShockProof™



A unique lubricant containing a suspension of solid microscopic particles as an extreme pressure agent--unique solid dispersion which cushions gear teeth to help prevent tooth breakage and allows the use of lower viscosities. Recommended for heavily-loaded racing differentials and transmissions, Off Road racing and problem gearboxes. The viscosity characteristics allow the lubricant to resist throwoff and provide a film thickness similar to a 75W250 grade, while providing the same low fluid friction as an SAE 75W90.

 

alot of guys have used it long enough that if any issues were going to pop up it would have by now.

 

Before I started using it years ago I emailed RedLine and its what they suggested from their products.When I got my 07 I emailed them again to check it was ok with the 6 speed, they reccd it again.

WB

 

Thanks for the info EZ. I'm near West Palm Beach...........the other side.

 

the stealer in fort myers fl. sells the red line products, i just had my 1000 mile done and had them put the redline products in all three holes. redline mtl in primary, heavy shockproof in tranny, and 20-50 in crankcase.. some other fellows ther said redline is some goos stuff....................... deano

 

I put Redline Vtwin tranny fluid in my 6 speed when I hit 1,000 miles just recently. Almost immediately I no longer had a problem finding neutral. Good stuff.

 

14 year old thread?

 

Hey, at least he searched and found the information he needed instead of asking the same question again. I think he should receive credit.....

 

why are people concerned with how old the threat is? If it's relevant, it's relevant