[Healeys] Dave Dougan's overdrive part 2

[Randy Hicks]

Seems to me that you are mixing apples and oranges here.

MTL is an 70/80 wt gear oil with the same viscosity as 5/30 wt. engine oil

MT90 is a 75/90 wt. gear oil with the same viscosity of 15/40 wt. engine oil,
so the change isn't from 30 wt to 90 wt.

Review the specs on Redlines site.

MT90 -   http://www.redlineoil.com/product.aspx?pid=46&pcid=7

MTL -  http://www.redlineoil.com/product.aspx?pid=45&pcid=7

I use MTL in the BJ8 and have found the MT90 works better in the 100's. 100's
just leak the MTL out too much!  :-)

Randy

Randy Hicks
'56 100M
'55 BN1 Dealer LeMans
'62 BN7 MkII
'65 BJ8
'53 MGTD
Healey100M at gmail.com







On Nov 16, 2009, at 11:04 AM, David Nock wrote:

> The Red Line MT90 is only correct if your transmission unit requires
> a 90 wt gear oil. The correct oil for most British transmissions with
> overdrive should be the Red Line MTL. This is a 75/80 wt gear oil and
> is the same viscosity as a 30 wt engine oil.
>
> The change from 30wt to 90wt usually is in the gear box and if there
> is a syncro on first gear. In most cases If the transmission had a
> syncro on first gear the manufacturer requires a 90wt gear oil. If
> there isnt a syncron on first gear the transmission requires a 30wt
> gear oil.
>
> We have been using the Red Line MTL in almost all transmissions for
> several years and have nothing but great success with it.
>
>
> David Nock
> British Car Specialists
> Stockton Ca 95205
> 209-948-8767
>
> www.britishcarspecialists.com
> .