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Discussion Starter #1
I posted this in another site but not getting any answers....

For the transmission, I've used the Redline V-Twin trans fluid in the past (pepto bismol), but this time I wanted to try the Redline gear oil (with shockproof).
However the dealer only has Redline 80w motorcycle gear oil with shockproof. Will this straight weight be ok in my 2014 Street Glide transmission? See attached picture.


2014 Street Glide.
 

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Viet Nam 69/70
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I use a straight synthetic 75-90. Can't see a straight 80 being a problem. But mine is in a warm garage and rarely gets parked over night 50 or below.

If I ran in cooler weather I'd run the 20-50.
 

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Discussion Starter #3
I use a straight synthetic 75-90. Can't see a straight 80 being a problem. But mine is in a warm garage and rarely gets parked over night 50 or below.

If I ran in cooler weather I'd run the 20-50.
Pardon me... no disrespect intended...
but I did not think 75-90 is considered a straight weight. I thought that was considered a multi-weight oil?
I am speaking of gear oil for the tranny, not motor oil.
 

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Wayward Son
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To answer your question. Yes.
But would recommend the mufti-viscosity as mentioned. I know of one very knowledgeable Member who recommends and runs Bel-ray 75\140.
And he rides in a cooler climate then what you have listed as your location.
 

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Put Syn3 in it and finding neutral will be real easy and HD reckon its ok to use as well.

I am on my 4th Tourer and the only difference I have noticed with heavy gear oils is they hit your wallet and make no difference.
 

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I posted this in another site but not getting any answers....

For the transmission, I've used the Redline V-Twin trans fluid in the past (pepto bismol), but this time I wanted to try the Redline gear oil (with shockproof).
However the dealer only has Redline 80w motorcycle gear oil with shockproof. Will this straight weight be ok in my 2014 Street Glide transmission? See attached picture.


2014 Street Glide.
but that was not my question.... can straight weight 80 be used.
Yes, 80 w is not the best , but it will work and not cause any harm to the transmission .

I'd use a 75w90 , Mobil1 75w90 is what I've used for a long time now.
 

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Yes, 80 w is not the best , but it will work and not cause any harm to the transmission .

I'd use a 75w90 , Mobil1 75w90 is what I've used for a long time now.
+1^^^
Mobile 1 75w140 or 75w90 gear lube in tranny. I also use Valvoline 75w140 full synthetic gear lube in my 08. The Valvoline is just as good as the Mobil 1 and it cost less.
Don't put syn 3 or any other motor oil in the tranny, the transmission is a gear box not a engine so gear lube is best.
 

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I used the H-D formula+ for my first tranny fluid change @ 1000 miles and I am happy with the results. Able to find neutral with ease.

I used Amsoil synthetic 75w-140 in my '08 Heritage tranny and I didn't notice any big change in noise or shifting. But I might try it (or equivalent) again in my '14 FLHX's tranny to see if the gear shifts get quieter.
 
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