Richmond 3.73's... how much "whine" is normal?
#1
Richmond 3.73's... how much "whine" is normal?
Well the 4.10 install didn't go as planned... after a while shimming it I realized the gears were meant for a 3-series carrier. I pulled out my new-in-box Richmond 3.73's (that I knew were for a 2-series carrier), sure enough that ring gear was a helluvalot thicker.
So I installed those. Amazingly the stock shims worked perfectly. The pattern was beautiful, had very little lash, so I put everything back together and popped in some fluid.
I took her out for a spin this morning. Forward and reverse everything seems fine until I let the car coast. Then I get this whining sound that resembles a big electric motor. No grinding. Shifting and acceleration seem unaffected.
On the forum here everyone seems to hate Richmonds because they whine, but how much whine is "normal"? This isn't a permanent swap... just something so my car isn't going 120 mph with 2.73's when I get it dyno-tuned Monday .
Thanks guys
So I installed those. Amazingly the stock shims worked perfectly. The pattern was beautiful, had very little lash, so I put everything back together and popped in some fluid.
I took her out for a spin this morning. Forward and reverse everything seems fine until I let the car coast. Then I get this whining sound that resembles a big electric motor. No grinding. Shifting and acceleration seem unaffected.
On the forum here everyone seems to hate Richmonds because they whine, but how much whine is "normal"? This isn't a permanent swap... just something so my car isn't going 120 mph with 2.73's when I get it dyno-tuned Monday .
Thanks guys
#3
Trax,
Years ago Richmond 4.10s was one of the first mods done to my Z. Before buying them I called a Richmond tech rep. and asked about gear noise in my application. No problem he tells me, theres very little noise when set up properly. The mechanic that put them in and was not a happy camper when I came to pick up the car. He had opened up the rear and checked the lash 3 times to try and figure out why they were still a little noisy.
So its like everyone says, Richmonds are some of the noisiest gears out there for our size rearends. If you like how the lash looks and the gears are temporary I think your fine. If your going to keep them in I'd look into a solid pinion spacer so they hold there setting better.
You do realize the only thing thats going to slow down at a given RPM on the dyno with the gear change is your tire speed.
Your neighbor, Rick
Years ago Richmond 4.10s was one of the first mods done to my Z. Before buying them I called a Richmond tech rep. and asked about gear noise in my application. No problem he tells me, theres very little noise when set up properly. The mechanic that put them in and was not a happy camper when I came to pick up the car. He had opened up the rear and checked the lash 3 times to try and figure out why they were still a little noisy.
So its like everyone says, Richmonds are some of the noisiest gears out there for our size rearends. If you like how the lash looks and the gears are temporary I think your fine. If your going to keep them in I'd look into a solid pinion spacer so they hold there setting better.
You do realize the only thing thats going to slow down at a given RPM on the dyno with the gear change is your tire speed.
Your neighbor, Rick
#4
I had the exact same gears before going to Motive 4.11's with a 3 series carrier.
They did make the electric whine you describe, but they never gave me any problems, I just wanted the 4.11's which is why I changed.
They did make the electric whine you describe, but they never gave me any problems, I just wanted the 4.11's which is why I changed.
#10
Update for those considering Richmond gears...
After a road test done by yours truly and a Fox-body pal of mine, we drove the car down a country road taking turns standing on the roadside to hear the car.
Observations:
1. Hooker LT's + Mufflex Y + Hooker Catback + 4000 rpm downshifts =
2. You cannot hear ANY whine from the outside of the car, only from the inside.
I think I'll just sell the 4.10's and leave the Richmond's in until I can afford the 12-bolt.
After a road test done by yours truly and a Fox-body pal of mine, we drove the car down a country road taking turns standing on the roadside to hear the car.
Observations:
1. Hooker LT's + Mufflex Y + Hooker Catback + 4000 rpm downshifts =
2. You cannot hear ANY whine from the outside of the car, only from the inside.
I think I'll just sell the 4.10's and leave the Richmond's in until I can afford the 12-bolt.
#13
Originally posted by trax
Update for those considering Richmond gears...
After a road test done by yours truly and a Fox-body pal of mine, we drove the car down a country road taking turns standing on the roadside to hear the car.
Observations:
2. You cannot hear ANY whine from the outside of the car, only from the inside.
Update for those considering Richmond gears...
After a road test done by yours truly and a Fox-body pal of mine, we drove the car down a country road taking turns standing on the roadside to hear the car.
Observations:
2. You cannot hear ANY whine from the outside of the car, only from the inside.
What do you all think?
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