Hero image

Smooth Shift Manual Gearbox and Diff Treatment (G70)

Nulon Smooth Shift Manual Gearbox and Diff Treatment (G70) with polytetrafluoroethylene (PTFE) will help provide smoother, easier gear changes, especially when cold. G70 reduces noise and wear, and extends manual gearbox and diff life. G70 is compatible with all lubricants including synthetic gear oils and automatic transmission oils used in gearboxes.

Nulon Smooth Shift Manual Gearbox and Diff Treatment (G70) with PTFE offers maximum lubrication and anti-wear protection to the gear and bearing surfaces of all types of gears (helical, spur and worm drive). Nulon G70 combines a balanced blend of Polytetrafluoroethylene (PTFE) with other extreme pressure and anti-corrosion compounds. Nulon G70 is suitable for use with all synchromesh rings and limited slip differentials.

The PTFE particles in Nulon G70 range from .4 to 40 microns. The smaller particles, when subjected to pressure and temperature, impregnate the friction surfaces thus reducing friction and offering residual lubrication and corrosion resistance even during lay-up periods. The larger PTFE particles circulate with the normal gear lubricant and create a cushion between gear surfaces, dramatically reducing gear pitting. This cushioning effect is important in that it reduces noise caused by minor irregularities of mating surfaces which are responsible for the very common "period noise" experienced in differentials.

Many modern gearboxes suffer from poor gear shifting when the gearbox is cold. As a result a number of manufacturers are recommending a lighter grade of oil, and in some cases automatic transmission fluid. These lighter grade oils provide superior gear changing at the expense of reduced life of gears and bearings, because the lower viscosity oil does not have the degree of EP (extreme pressure) protection. Nulon G70, due to its EP characteristics, will greatly improve protection as well as dramatically improve gear changes.

Note: G70 is suitable for all gearboxes including passenger cars, trucks and industrial gearboxes.

G70 is also compatible with, and suitable for use with, automatic transmission fluid and engine oils, where they are the manufacturer's recommended lubricant for manual gearboxes.


  • Reduced friction and wear
  • Smoother gear changes
  • Quieter operation
  • Extended component life
  • Reduced oil leaks
  • Improved extreme pressure protection
  • Residual lubrication during lay-up periods
  • Corrosion protection
  • Reduced operating temperature
  • Reduced energy consumption in industrial gearboxes

Directions for Use

Simply add required amount of G70 (according to application rate chart) to the gearbox or differential.
Repeat application with each oil change.

Application Rates

  • Up to 8 litres (8 quarts) oil - Add 125 ml (4.23 US fl oz) per 2 litres (2 quarts)
  • Over 8 litres (8 quarts) oil - Add 500 ml (17 US fl oz) + 3% by volume thereafter.

Warning: Do not use G70 in automatic transmissions.

Note: Nulon G70 is suitable for use in Laycock overdrive units as used in MGs and Triumphs.

Typical Properties

Tests ASTM Nulon G70
Colour   Cream
Flash point, COC, °C D92 182
Foam characteristics D892 Nil
Viscosity @ 40°C, cSt D445 953.52
Viscosity @ 100°C, cSt D445 162.22
Viscosity index D2270 574
Density K/l D1298 0.9825
Pour point °C D97 -18
Melt point of PTFE °C D1457 >325

How our customers rate this product.

Average rating of 5/5

5 customer reviews

5 Star
4 Star
3 Star
2 Star
1 Star

Most Helpful Customer Reviews

Feedback: Manual Gearbox and Diff Treatment , 28 May 2017 Harry By Harry
I have a 1994 Daihatsu Rocky with 230k Km on it. had a little diff and gear box noise added G70 and you would not believe the difference it made I can actually hear the motor now all the diff and gearbox noise has gone, gear changes are much smoothere now. Just a fantastic product. I also use the engine flush and the oil treatment, just for my peace of mind.
Was this review helpful to you?     Yes No
26 of 27 people found this helpful
Feedback: Smooth Shift Manual Gearbox and Diff Treatment , 02 Oct 2018 Red Rocket By Red Rocket
1 tube added to aging T5 = quieter + smoother shift. great stuff!
Was this review helpful to you?     Yes No
10 of 10 people found this helpful
05 Dec 2019 luke By luke
I added a tube to my gearbox, differentials and transfer case in my 2017 Toyota landcruiser, and the results have been dramatic. It slips into gear with a very smooth action, and the whole drive train is totally silent at speed now. This product is highly recommended. I will use this at every gear oil change from now on. When used in combination with the Nulon GL - 5 gear oil, you WILL definitely notice it's effects on both gear changing and drive train noise immediately. Thoroughly impressed with this quality product.
Was this review helpful to you?     Yes No
7 of 7 people found this helpful
07 Oct 2020 Injection Connection By Injection Connection
Ive used this product for over 30 years, first in my Subaru which had bad syncro into 2nd gear.... fixed it completely and wasblown away. As always was sceptical about additives, so I tried a tube in my Harley Evo 4 speed, and it transformed it from a very agricultural gearbox to a very slick shifting one snd impressed all my mates when they tried it..... Now I put it in everything diffs and gearboxes... highly recommend this product, and only reason Im on here is because I couldnt find it, but now realize it's been renamed...
Was this review helpful to you?     Yes No
5 of 5 people found this helpful
30 Mar 2020 EEG By EEG
This is fabulous stuff: it brought a 1997 Mitsubishi Galant gearbox back to silky smooth shifting life. Most highly recommend this!
Was this review helpful to you?     Yes No
3 of 3 people found this helpful


Is Nulon G70 Manual Gearbox and Differential Treatment a limited slip differential (LSD) additive?

No, Nulon Smooth Shift Manual Gearbox and Diff Treatment (G70) does not replace the LSD additives that are found in dedicated LSD oils. Nulon G70 can be added to both conventional and LSD differentials to enhance lubricant performance and provide maximum anti-wear protection.

35 of 41 people found this helpful
Help Us Help You
Was this helpful to you?     Yes No

Related Questions

View more F.A.Q.s
Can't find an answer to your Question?