5 speed transmission grease
 

I recently had my 5 speed transmission rebuilt (unnecessarily, but that is a
story for another day). When I picked up the car ( 95 Cherokee) the shop told
me they had filled the gear box with 10W -30 motor oil. I pointed out that
the owners manual, and every other manual that I have seen, calls for 75-90
weight gear grease, GL 5. The 10W-30 does not sound right to me. Any input
about this would be appreciated.

Re: 5 speed transmission grease
 

I am going to go with the engineers who designed the transmission over the
guys who rebuilt a good transmission on this one and tell you to stick with
what the manual tells you.



"milton" <u19588@uwe> wrote in message news:5d1c54ccaa607@uwe...
>I recently had my 5 speed transmission rebuilt (unnecessarily, but that is
>a
> story for another day). When I picked up the car ( 95 Cherokee) the shop
> told
> me they had filled the gear box with 10W -30 motor oil. I pointed out
> that
> the owners manual, and every other manual that I have seen, calls for
> 75-90
> weight gear grease, GL 5. The 10W-30 does not sound right to me. Any
> input
> about this would be appreciated.

Re: 5 speed transmission grease
 

I am going to go with the engineers who designed the transmission over the
guys who rebuilt a good transmission on this one and tell you to stick with
what the manual tells you.



"milton" <u19588@uwe> wrote in message news:5d1c54ccaa607@uwe...
>I recently had my 5 speed transmission rebuilt (unnecessarily, but that is
>a
> story for another day). When I picked up the car ( 95 Cherokee) the shop
> told
> me they had filled the gear box with 10W -30 motor oil. I pointed out
> that
> the owners manual, and every other manual that I have seen, calls for
> 75-90
> weight gear grease, GL 5. The 10W-30 does not sound right to me. Any
> input
> about this would be appreciated.

Re: 5 speed transmission grease
 

I am going to go with the engineers who designed the transmission over the
guys who rebuilt a good transmission on this one and tell you to stick with
what the manual tells you.



"milton" <u19588@uwe> wrote in message news:5d1c54ccaa607@uwe...
>I recently had my 5 speed transmission rebuilt (unnecessarily, but that is
>a
> story for another day). When I picked up the car ( 95 Cherokee) the shop
> told
> me they had filled the gear box with 10W -30 motor oil. I pointed out
> that
> the owners manual, and every other manual that I have seen, calls for
> 75-90
> weight gear grease, GL 5. The 10W-30 does not sound right to me. Any
> input
> about this would be appreciated.

Re: 5 speed transmission grease
 

I am going to go with the engineers who designed the transmission over the
guys who rebuilt a good transmission on this one and tell you to stick with
what the manual tells you.



"milton" <u19588@uwe> wrote in message news:5d1c54ccaa607@uwe...
>I recently had my 5 speed transmission rebuilt (unnecessarily, but that is
>a
> story for another day). When I picked up the car ( 95 Cherokee) the shop
> told
> me they had filled the gear box with 10W -30 motor oil. I pointed out
> that
> the owners manual, and every other manual that I have seen, calls for
> 75-90
> weight gear grease, GL 5. The 10W-30 does not sound right to me. Any
> input
> about this would be appreciated.

Re: 5 speed transmission grease
 

Mine says 75W90 API GL5 too. Others in this newsgroup have said that there
are problems with GL5, because of sulfur. I don't know about that, but it
would be a mistake to put 10W30 in this transmission. It doesn't have the
"shear strength" that 75W90 does. Shear strength refers to the ability of a
lubricant to prevent direct metal-to-metal contact of lubricated parts.
Gears, shafts and bearings are all designed to ride on a film of gentle,
cushioning oil, not on each other.

Off the counter 75W90 lubricants will sometimes have limited slip additive
in them. This would bad for the synchromesh clutches in your transmission.
Jerry is going to take issue, but I have had good luck with Mobil 1 75W90
synthetic gear oil. Other people recommend Redline Manual Transmission
Fluid. Using the cheapest off the shelf formulation is false economy here,
considering what the transmission cost you.

Earle

"milton" <u19588@uwe> wrote in message news:5d1c54ccaa607@uwe...
> I recently had my 5 speed transmission rebuilt (unnecessarily, but that is
a
> story for another day). When I picked up the car ( 95 Cherokee) the shop
told
> me they had filled the gear box with 10W -30 motor oil. I pointed out
that
> the owners manual, and every other manual that I have seen, calls for
75-90
> weight gear grease, GL 5. The 10W-30 does not sound right to me. Any
input
> about this would be appreciated.

Re: 5 speed transmission grease
 

Mine says 75W90 API GL5 too. Others in this newsgroup have said that there
are problems with GL5, because of sulfur. I don't know about that, but it
would be a mistake to put 10W30 in this transmission. It doesn't have the
"shear strength" that 75W90 does. Shear strength refers to the ability of a
lubricant to prevent direct metal-to-metal contact of lubricated parts.
Gears, shafts and bearings are all designed to ride on a film of gentle,
cushioning oil, not on each other.

Off the counter 75W90 lubricants will sometimes have limited slip additive
in them. This would bad for the synchromesh clutches in your transmission.
Jerry is going to take issue, but I have had good luck with Mobil 1 75W90
synthetic gear oil. Other people recommend Redline Manual Transmission
Fluid. Using the cheapest off the shelf formulation is false economy here,
considering what the transmission cost you.

Earle

"milton" <u19588@uwe> wrote in message news:5d1c54ccaa607@uwe...
> I recently had my 5 speed transmission rebuilt (unnecessarily, but that is
a
> story for another day). When I picked up the car ( 95 Cherokee) the shop
told
> me they had filled the gear box with 10W -30 motor oil. I pointed out
that
> the owners manual, and every other manual that I have seen, calls for
75-90
> weight gear grease, GL 5. The 10W-30 does not sound right to me. Any
input
> about this would be appreciated.

Re: 5 speed transmission grease
 

Mine says 75W90 API GL5 too. Others in this newsgroup have said that there
are problems with GL5, because of sulfur. I don't know about that, but it
would be a mistake to put 10W30 in this transmission. It doesn't have the
"shear strength" that 75W90 does. Shear strength refers to the ability of a
lubricant to prevent direct metal-to-metal contact of lubricated parts.
Gears, shafts and bearings are all designed to ride on a film of gentle,
cushioning oil, not on each other.

Off the counter 75W90 lubricants will sometimes have limited slip additive
in them. This would bad for the synchromesh clutches in your transmission.
Jerry is going to take issue, but I have had good luck with Mobil 1 75W90
synthetic gear oil. Other people recommend Redline Manual Transmission
Fluid. Using the cheapest off the shelf formulation is false economy here,
considering what the transmission cost you.

Earle

"milton" <u19588@uwe> wrote in message news:5d1c54ccaa607@uwe...
> I recently had my 5 speed transmission rebuilt (unnecessarily, but that is
a
> story for another day). When I picked up the car ( 95 Cherokee) the shop
told
> me they had filled the gear box with 10W -30 motor oil. I pointed out
that
> the owners manual, and every other manual that I have seen, calls for
75-90
> weight gear grease, GL 5. The 10W-30 does not sound right to me. Any
input
> about this would be appreciated.

Re: 5 speed transmission grease
 

Mine says 75W90 API GL5 too. Others in this newsgroup have said that there
are problems with GL5, because of sulfur. I don't know about that, but it
would be a mistake to put 10W30 in this transmission. It doesn't have the
"shear strength" that 75W90 does. Shear strength refers to the ability of a
lubricant to prevent direct metal-to-metal contact of lubricated parts.
Gears, shafts and bearings are all designed to ride on a film of gentle,
cushioning oil, not on each other.

Off the counter 75W90 lubricants will sometimes have limited slip additive
in them. This would bad for the synchromesh clutches in your transmission.
Jerry is going to take issue, but I have had good luck with Mobil 1 75W90
synthetic gear oil. Other people recommend Redline Manual Transmission
Fluid. Using the cheapest off the shelf formulation is false economy here,
considering what the transmission cost you.

Earle

"milton" <u19588@uwe> wrote in message news:5d1c54ccaa607@uwe...
> I recently had my 5 speed transmission rebuilt (unnecessarily, but that is
a
> story for another day). When I picked up the car ( 95 Cherokee) the shop
told
> me they had filled the gear box with 10W -30 motor oil. I pointed out
that
> the owners manual, and every other manual that I have seen, calls for
75-90
> weight gear grease, GL 5. The 10W-30 does not sound right to me. Any
input
> about this would be appreciated.

Re: 5 speed transmission grease
 

In article <5d1c54ccaa607@uwe>, milton <u19588@uwe> wrote:
>I recently had my 5 speed transmission rebuilt (unnecessarily, but that is a
>story for another day). When I picked up the car ( 95 Cherokee) the shop told
>me they had filled the gear box with 10W -30 motor oil. I pointed out that
>the owners manual, and every other manual that I have seen, calls for 75-90
>weight gear grease, GL 5. The 10W-30 does not sound right to me. Any input
>about this would be appreciated.

Hmmm, sounds like they have been working on too many vintage Honda manual
transmissions. :-)

I would do the 75-90 gear oil but not the GL5. I use Redline 75-90 GL4 I
think and that is friendly to the syncros.

Good Luck...

BTW what kind of wallet damage to have your 5 speed tranny rebuilt? I am
assuming it's an AX-15.


--
Jeeps and dubs and everything's nice...