metal oil transmission pump

[tr7sprint1]

Has anyone tried The Wedge Shop metal transmission oil pump? I rather use the metal one instead of the plastic thing the factory used.

Any good or bad reports?






<b>"GETTING SPEED OUT OF A LOW POWERED CAR IS OFTEN MORE REWARDING, THAN WITH TIRE-SMOKING BRUTES" </b>

[FI Spyder]

I too am interested. I got the metal pump in an order from Rimmers this past winter. I was surprised to see it as I wasn't aware they were made in metal. I haven't installed it as I got it as a spare part for when I overhaul a LT77.


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

[Workshop Help]

Ummmm? What about all that swarf being sucked into the teeth of those metal pump gears? Will that wreck the pump and the housing and the mainshaft and the layshaft and the input shaft which in turn wrecks the main case at the front bearing?

For all it's apparent weakness, the fiber gears, being much softer, will absorb the metal swarf and flake off a piece, yet keep on going without seizing up the works.

Is my logic making any sense today?

Until an effective way of filtering the incoming oil to the pump is devised, frequent gearbox oil changes are the only way to protect the pump and the rest of the whirling steel in there. A metal oil pump may well be the kiss of death for a maintainence neglected LT77.

Mildred Hargis

[FI Spyder]

That also crossed my mind but how much will be produced when pumping oil? Maybe next to none compared to the swarf of the other components.

Interesting observation: When I drained the regular gear oil on the Spider that has 91,000 miles there was virtually no swarf on the magnetic plug(it had original type gear oil although I don't know if it was ever changed).

On the Yellow TCT with 30,000 miles it had lots of swarf on the magnetic plug.

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

[Beans]

<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 Mildred</i>

... Is my logic making any sense today? ... <hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
Yes.

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[Bobbieslandy]

Is the sump plug magnetic and does the pump have a filter? i'd like to assume that nylon gears or not, swarf is prevented from being pumped around by one or other of the above means. A pump which was allowed to circulate swarf would'nt last too long at all, the nylon "sine" pumps i use at work show massive damage when exposed to swarf or any other abrasive. The nylon tends to heavily score rather than absorb the swarf, much like the steel impellers of our centrifugal pumps and load pumps. Are our gearbox pumps really this exposed?

[Workshop Help]

Yes, they are. The pickup for the oil pump draws the oil from the area at the drain plug without benefit of any filtering or screening. The oil is drawn up into the fiber gear pump to be distributed up thru the mainshaft to the bearings at the front of the mainshaft and input shaft. The oil dribbles onto the layshaft and is flung about the inside of the case where it finally collects along with the accumulation of swarf from the interaction of the various gears and bearings. The process then starts again.

The only diversions of the swarf is the magnetic drain plug and the gathering of the swarf in the trough under the oil pump.

This is why frequent draining and flushing of the LT77 gear oil is so encouraged. We, under no circumstances, want the swarf to interact with the expensive gears and bearings if it can be prevented. Should someone wish to come up with a new way to filter the gear oil, I am all ears as is everyone else in this forum.

Mildred Hargis

[Bobbieslandy]

I don't think mine has been changed for at least 20 years[:I]