Description
GMB GUMZ-11 staked universal joint for the Mazda RX-7. Made in Japan by GMB Corporation. New old stock, never fitted. The box shows storage age. The joint is new and unused.
Four in stock.
Off the label. The sticker says UNIVERSAL JOINT MAZDA/FORD (STAKED). There are no sizes printed on it.
Size. GMB list it at 22.06mm caps and 61.7mm across. It is smaller than the GUMZ-12 we also stock.
The RX-7 link. GMB list GUMZ-11 for the RX-7, all models, against Mazda propshafts M026-25-100, M041-25-100, M051-25-100 and M060-25-100C. Mazda's own parts data puts M026-25-100 on the 1984 and 1985 RX-7. GMB also list four more Mazda shafts with a P0 prefix and no model named, so measure yours.
Staked, not clipped. The yoke gets peened over the caps at the factory. You will not find clips or a grease nipple on this one.
Off the box
- GMB GUMZ-11
- GMB Corporation, made in Japan
- Dealer label: UNIVERSAL JOINT MAZDA/FORD (STAKED)
- Barcode 9492303292052
Fitment
Get a vernier on the old joint. You want 22mm across a cap and 61.7mm end to end. Send us your rego and we will do the digging if you would rather we did.
Fitting
- Mark the shaft halves before you separate them so they go back in phase.
- Grind or file the old stakes off, then press out the old joint.
- Press the new joint home and peen the yoke over each cap.
- Rotate the joint by hand and feel for any tight spot.
Best fitted by a qualified mechanic.