Transmission Oil Online - PartsForMachines

FAQs

Always check the equipment manual for the manufacturer's recommended oil specification. The specification typically gives: viscosity grade (e.g., SAE 75W-90), API/GL class (e.g., GL-5), and OEM-specific approval (e.g., Volvo 97312, MAN 342, MB-Approval 235.0). All three must be matched. Do not substitute on viscosity alone — different transmissions need different additive packages, friction modifiers, and wear additives. Wrong-spec oil can cause synchroniser damage, clutch-pack slipping (in automatic transmissions), and accelerated wear. The product page lists each oil's specifications and approvals.

API GL classification rates the load-carrying capacity and additive package of gear oils. GL-4: moderate extreme-pressure (EP) additive levels — suited to synchronised manual gearboxes (the EP additives in GL-5 oils can attack synchroniser brass at low gearbox speeds). GL-5: high EP additive levels — required for hypoid axles where the gear-tooth pressure is very high. GL-4/5: combined formulation suitable for both applications. Modern manual gearboxes specify GL-4 (or GL-4/5); modern hypoid axles specify GL-5. Mismatching can cause synchroniser pitting (using GL-5 in a synchronised gearbox).

Dexron is the GM-specified ATF specification family; Mercon is the Ford-specified equivalent. Dexron II: older specification, suited to early-generation electronic automatic transmissions. Dexron III: improved oxidation resistance, suited to mid-1990s onwards. Dexron VI: latest GM specification, backwards-compatible with III. Mercon V: Ford specification, generally compatible with Dexron III applications. Specialist OEM ATF grades (ZF, Aisin, Mercedes, BMW) have their own specifications and should be used where specified — substitution can cause clutch-pack issues. The product page lists the compatible specifications.

Yes. Transmission oil-change service kits (with the matching oil quantity, sealing washers for drain and fill plugs, and replacement filters where applicable for the specific equipment), fluid-fill pumps (for filling transmissions where the fill point is at gearbox-side level rather than top-fill), and fluid-extraction tools (for removing old oil through the dipstick tube on equipment without bottom drain plugs) are available alongside the transmission-oil range. Match by the equipment make and model.

Every product is backed by our Fit Guarantee. If a part is incompatible with your machine, you can return it hassle-free. For damaged-on-arrival items, report within 24 hours with photographs to [email protected] — we will arrange collection. For other returns, email us first to obtain a Return Merchandise Number before sending. Returns are accepted within 30 days of purchase, in original packaging, on UK orders. A restocking fee may apply on returns where the buyer has changed their mind. Refunds are issued to the original payment method once the return is inspected.

Delivery time depends on the product, your destination, and availability — the estimated time for any item appears on the product page, and "Check where we deliver" confirms coverage for your postcode before you order. Next-day delivery is available on most products; the option appears at checkout when applicable. We deliver across the UK, Europe, the Middle East, and Africa. Use the country selector at checkout to confirm coverage and delivery options for your destination.

Density at 15°C	0.87 g/cm³
Kinematic Viscosity at 40°C	55.3 mm²/s
Kinematic Viscosity at 100°C	10.2 mm²/s
Viscosity Index	170
Pour Point	-48°C

Density @ 15C, Relative	0.896 g/ml
Viscosity, Kinematic 100C	14.0 mm²/s
Viscosity, Kinematic 40C	134.9 mm²/s
Viscosity Index	101
Viscosity, Brookfield @ -26C (80W)	127000 mPa.s (cP)

Density, 15 °C	0,892 g/ml
Viscosity Grade	SAE 80W-90
Kinematic Viscosity, 40 °C	145.4 mm²/s
Kinematic Viscosity, 100 °C	14.57 mm²/s
Viscosity Index	99

Density, 15 °C	0,85 g/ml
Kinematic Viscosity, 40 °C	34.8 mm²/s
Kinematic Viscosity, 100 °C	7.3 mm²/s
Viscosity Index	185
Brookfield Viscosity, -40 °C	15 Pa.s

Density, 15 °C	0,909 g/ml
Viscosity Grade	SAE 85W-140
Kinematic Viscosity, 40 °C	431 mm²/s
Kinematic Viscosity, 100 °C	29.30 mm²/s
Viscosity Index	96

Viscosity Grade	SAE 90
Density, 15 °C	0,9 g/ml
Kinematic Viscosity, 40 °C	172.5 mm²/s
Kinematic Viscosity, 100 °C	17.1 mm²/s
Viscosity Index	106

SAE Viscosity Grade	80W-90
Kinematic Viscosity@40 °C	146 mm²/s
Kinematic Viscosity@100 °C	14.7 mm²/s
Viscosity Index	100
Density@15Â°C	900 kg/m³

SAE Viscosity Grade	85W-140
Kinematic Viscosity@40°C	358 mm²/s
Kinematic Viscosity@100°C	25.6 mm²/s
Viscosity Index	94
Density@15°C	908 kg/m³

Density @ 15C, Relative	0.859 g/ml
Viscosity, Kinematic 100C	7.2 mm²/s
Viscosity, Kinematic 40C	35 mm²/s
Viscosity Index	175
Viscosity, Brookfield @ -40C (75W)	16500 mPa.s (cP)

Density, 15 °C	0,868 g/ml
Viscosity Grade	SAE 75W-90
Kinematic Viscosity, 40 °C	92.8 mm²/s
Kinematic Viscosity, 100 °C	14.07 mm²/s
Viscosity Index	156

Kinematic Viscosity@40°C	37 cSt
Kinematic Viscosity@100°C	7.6 cSt
Viscosity Index	180
Density@15°C	847 kg/m³
Flash Point	180°C

Density @ 15C	0.847 g/ml
Viscosity, Kinematic 100C	9.0 mm²/s
Viscosity, Kinematic 40C	53.9 mm²/s
Viscosity Index	147
Viscosity, Brookfield @ -40C (75W)	19000 mPa.s (cP)

Density @ 15C	0.837 g/ml
Viscosity, Kinematic 100C	11.9 mm²/s
Viscosity, Kinematic 40C	64.6 mm²/s
Viscosity Index	183
Viscosity, Brookfield @ -40C (75W)	18000 mPa.s (cP)

Density @ 15C, Relative	0.8665 g/ml
Viscosity, Kinematic 100C	15 mm²/s
Viscosity, Kinematic 40C	104 mm²/s
Viscosity Index	154
Viscosity, Brookfield @ -40C (75W)	67000 mPa.s (cP)

SAE Viscosity Grade	75W-140
Kinematic Viscosity@40°C	172.4 mm²/s
Kinematic Viscosity@100°C	24.5 mm²/s
Dynamic Viscosity@-40°C	135000 mPa s
Shear Stability (Viscosity after shearing)@100°C	24.3 mm²/s

Density @ 15C	0.858 g/ml
Viscosity, Kinematic 100C	15.4 mm²/s
Viscosity, Kinematic 40C	101 mm²/s
Viscosity Index	161
Viscosity, Brookfield @ -40C (75W)	50400 mPa.s (cP)

Viscosity Grade (Engine)	SAE 10W-30
Viscosity Grade (Gear)	SAE 75W-80
Density @15°C	0.871 g/ml
Density @20°C	0.868 g/ml
Kinematic Viscosity @40°C	55.1 mm²/s

Density, 15 Â°C	0,896 g/ml
Viscosity Grade	SAE 80W-90
Kinematic Viscosity, 100 °C	15.5 mm²/s
Viscosity Index	101
Brookfield Viscosity, -26 °C	129 Pa.s

Density @ 15°C, Relative	0.859 g/ml
Viscosity, Kinematic 100°C	7.2 mm²/s
Viscosity, Kinematic 40°C	35 mm²/s
Viscosity Index	175
Viscosity, Brookfield @ -40°C (75W) : 16500 mPa.s (cP) Pour Point : -45 °C

SAE Viscosity Grade	30
Kinematic Viscosity @40°C	93.9 mm²/s
Kinematic Viscosity @100°C	10.9 mm²/s
Density @15°C	899 kg/m³
Flash Point (COC)	205°C

SAE Viscosity Grade	10W
Kinematic Viscosity@40°C	36 mm²/s
Kinematic Viscosity@100°C	6 mm²/s
Density@15°C	884 kg/m³
Flash Point (COC)	200°C

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How do I match transmission oil to my equipment?

GL-4, GL-5, or GL-4/5 — what's the difference?

ATF — Dexron II, III, VI, or Mercon V?

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