Transmission Gearbox Filling advice and Oil Type

[Sean Roth]

[quote]<i>Originally posted by darrellw</i>

Hi Sean,

GM or Pennzoil Synchromesh is a popular choice:

http://www.amazon.com/Synchromesh-Manua ... syncromesh

If I was going to use a Redline product, I would look at their MTL, which is spec'ed for similar characteristics as the synchromesh.

Should I use this for the gearbox differential as well?
Darrell Walker
66 TR4A IRS-SC CTC67956L
81 TR8 SATPZ458XBA406206
Vancouver, WA, USA
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">


Should I use this fluid for the rear differential as well?
SF Roth

[saabfast]

NO, the rear axle needs a hypoid gear oil, EP80 or EP90 (can't remember which and don't have the car/manual here atm)

Alan
Saab 9000 Stg 1 (now passed to son for his family car)
Saab 9000 2.3 FPT Auto (now gone that others might live)
Saab 9000 2.3 LPT Auto
Saab 9-5 2.3 Vector Auto Estate
'81 TR7 DHC

[Sean Roth]

I bought some redline MTL for the tranny.

SF Roth

[windy one]

<blockquote id="quote"><font size="1" face="Century Gothic, Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by darrellw</i>

Hi Sean,

GM or Pennzoil Synchromesh is a popular choice:
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">

Pennzoil my Good Man!


Johnny

[silverseven]

and GM fluids for me ......[:D]

Ron.

[john 215]

Hi,

MTF 94 for me, get it very cheap from work [;)]

As mentioned before from introduction in the SD1 the boxes had EP 90/80 in them, was changed to ATF due to baulking when cold esp. 2nd gear, oils have moved on a lot it the best part of 40 years and we now have oils simply not available back them.

Cheers John


LIVE LIFE A QUARTER OF A MILE AT A TIME!

1976 Speke FHC Beauty Now with an overdrive conversion

1979 3.5 FHC(STATUS PENDING!!)

1982 2.0 DHC NOW A 4.6, BUILT NOT BROUGHT !!!!

[TR Tony]

Is that the same Texaco MTF94 that Mike Smith recommended John? Or the modern version of it anyway?

Tony

<font size="1">1981 TR7 FHC Cavalry Blue
1980 TR7V8 DHC Jaguar Regency Red - sadly sold!
1977 TR8 FHC EFI Factory development car Inca Yellow</font id="size1">

[Hasbeen]

That is so true John. In 1963 I could not get a full weekend at Bathurst out of the TR3A engine in my new Morgan +4. After practice, 11 laps about 42 miles, I fortunately checked the big end slippers, fitted just before the meeting, & they were Vandervell bearings. The slipper in the cap were down to copper.

That was using BP course racing oil, one of the best then. I had to change big ends after every race.

A year later, with STP I could get the full Bathurst, & another meeting between bearing changes.

Those racing the same things today in classic racing do a full season, without even thinking about bearings, oils have improved so much.

Hasbeen

[Hasbeen]

I've now done about 900 kilometers in about 5 trips on the new Penrite oil in the gearbox, & am quite happy with it.

I made a point of cleaning up the drip trays under the car when I did the change, & so far it is quite interesting. There are just a few drips of ATF in the tray, & no sign of any gear oil.

There must have been some ATF hiding somewhere, perhaps the rear mount subframe. Could it be that this stuff doesn't get out as easily as ATF. It would be nice to have a 7 that didn't mark it's territory, but then I suppose rust would be a bigger problem.

Hasbeen

[Chunk]

MTF 94 is available from Land Rover dealers. That's where i got mine from. I pressume it is still Texaco.
It is used in the PG1 gearbox fitted to the Mk1 Freelander 1800.
It would appear it goes in R380 aswell, which is V8 manual.
The PG1 gearbox was fitted to the 2 litre front wheel drive Rovers.
As John said, any modern gear oil would be good, especially synthetic.

1979 TR7V8 FHC.
DJE 4.6 Block and Heads.
24 years of tinkering and tuning......So far!
Now available in red.

[Cobber]

The PG1 gearbox is also found in the MG-F and MG-TF


"Keep calm, relax, focus on the problem & PULL THE BLOODY TRIGGER"

80'Triumph TR7, 73'Land Rover (Ford 351. V8),
'89 Ford Fairlane
'98 MG-F, 69'Ford F250.
76' Ford F100

[john 215]

Hi,

<blockquote id="quote"><font size="1" face="Century Gothic, Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><font color="red">The PG1 gearbox is also found in the MG-F and MG-TF</font id="red"><hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">

First saw light of day with Austin Rover in the Rover 800 ( a early different version was found in the Acclaim ) then 2 litre Maestro ( MG and VP ) and Montego, then in Honda engine cars, in fact a Honda box, then the MGF TF. When first released was filled with engine oil and then in the early 90's was filled with MTF 94, about the time the Rover ' Tom Cat ' turbo came out which was fitted with torsion LSD. Very easy box to strip and rebuild and on the whole very reliable, as mentioned it is after all a Honda box !

Cheers John




LIVE LIFE A QUARTER OF A MILE AT A TIME!

1976 Speke FHC Beauty Now with an overdrive conversion

1979 3.5 FHC(STATUS PENDING!!)

1982 2.0 DHC NOW A 4.6, BUILT NOT BROUGHT !!!!

[Spike]

On my never ending list of jobs I'm was planning to change the gearbox oil to Castrol Syntrans Multivehicle, though my local Halfords have seem to stopped stocking it.

Is there any recommendations, or is it just as simple as warm the gearbox up a bit and then let it drain for a while? I'm assuming it got standard ATF fluid in it at the moment.

One tip I've had is to make sure you can get the filler bolt out first before draining.

Graham

[jclay (RIP 2018)]

When it comes to Triumphs, <b>ASSUME NOTHING!</b>

The filler bolt is hard to get to with the transmission in the car. Here is a photo of the transmission. You can see the black filler bolt just to the right of the gear box. http://www.jclay.me/jclay/Triumph_TR-7.html#1 The photo is at the bottom of the page.

I filled the box with Pennsoil synchromesh gear oil and never regretted doing so. I did rinse the transmission with Varisoil before filling with oil.

It takes two quarts of oil to fill the transmission. I wish I could tell you that there is a easy way to fill the transmission with it in the car, but I haven't found a good way yet.

Clay

[url="http://www.jclay.me/"]My Triumph Site[/url], [url="http://www.triumphtechnical.me"]Technical Stuff[/url], [url="https://docs.google.com/folder/d/0B8MWEvqOpX3udEF4SmFQUW9RS09hbU5uNW5Wd0xrUQ/edit"]My Public Folder[/url],

[FI Spyder]

Warm oil will drain better than cold oil plus any "stuff" is more likely in suspension after it's been used and is warm (just like engine oil draining).

Having the fill plug out first may give an initial burst of oil running out the drain hole but we may be talking about how many angels can dance on the head of a pin here as to how much difference it will make. It won't make any difference to the ultimate amount of oil drained out. Only temp/time does that. Leave it while it's draining, go do something else, pick up pine cones off the lawn if you live in the Pacific Northwest, coyote droppings off the lawn if you live in the Southwest, water the lawn if you live in California (don't let the neighbours or the law see you), walk down to the pub and have a pint of bitters if you're in the UK or chase the roos out of the back 40 if you live in Australia.

As to what oil you use, it must match the friction requirements of the syncros in the transmission (it varies from one type of transmssion to another). Ours works on the Pennzoil Synchromesh MTF or it's GM equivalent (search) commonly available in N/A maybe less so in other areas. If those aren't available in your area there is less info/experience on others. Just because one oil works on car X doesn't mean it will works on yours, in fact the LT77 is rather particular and gets more particular as the syncros get more worn.

I fill it with a piece of clear plastic tubing (the kind you can get at an aquarium shop or Mildred's favourite place the local hardware store) and attach it to a thumb pump type oil can. 2 quarts can make the thumb a little tired but a rest can be taken.

- - -TR7 Spider - - - 1978 Spitfire- - - - 1976 Spitfire - - 1988 Tercel 4X4 - Kali on Integra - 1991 Integra - Yellow TCT