The 6 Best Thicker Transmission Fluids (2022 reviews)

Not everyone likes to purchase fluid for their daily purpose, but the Red Line Thicker Transmission Fluid would be an anomoly. The red line thicker transmission fluid improves performance, makes trans quieter and it is thick like pepto-bismal. Make sure this fits by entering your model number. This product dampens transmission noise ( reducing the notorious shifting clunk found in these gearboxes ), dramatically reduces temperature, provides thicker oil films between gear teeth and resists throw - off for all aftermarket versions like baker jims s&s etc.

Above all, the red line thicker transmission fluid is made for good stuff and it thus far.

Most customers agree that the fluid is used to have to fiddle quite a bit to find neutral before using this oil. Also, a few also found that the fluid was recommended by a h-d dealership mechanic. And, they say that the fluid is signifantly reduced, making a quiet, smooth shifting experience.

Top Customer Quotes:

This is designed to make a big impact against big impacts.
This is much smoother now, is the best and it is built for heavy duty.
This is designed for a great price and it makes for more positive gear changes.
And the shifts are smother than using the Harley recommended oil.

Best For Peace Of Mind: Castrol Thicker Transmission Fluid

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The Castrol Thicker Transmission Fluid's material feels more premium than its price would suggest. The castrol thicker transmission fluid comes with part number and it is fully synthetic. Make sure this fits by entering your model number. And, the fluid can be used in power steering applications where mercon is required.

The fluid is the best, works great and it smooths out shifts. In addition, it is reliable, works well and it worked out well. Lastly, the castrol thicker transmission fluid dropped the pan, is great for a great price and it is good for peace of mind.

Most buyers found that the fluid is a good choice for all gm vehicles. Furthermore, a few also found that the fluid is great for replacing fluid in the 2011 outback. Moreover, a few strongly agree that this fluid would be fine for a 2001 toyota camry that calls for either dex ii or dex iii. Overall, for most customers, Castrol product was what they were looking for.

Top Customer Quotes:

This is mostly on hybrid vehicles.
This is common, works perfectly and it shifts great.
This is great for the zf hp5.
This works well on a 08 maximum.

Best For Power Steering Systems: Valvoline Thicker Transmission Fluid

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We would, of course, be remiss if we didn't mention Valvoline Thicker Transmission Fluid for daily usage. The valvoline thicker transmissionfluid runs quieter and has an excellent design. Manufacturer says: Our commitment to performance, quality, and innovation has gone into every product we make. Also, it is because of this legacy that people have trusted valvoline products in their vehicles from the model to today's newest models.

The fluid works well for power steering systems, works great and it can be used for many more applications. Lastly, the valvoline thickertransmission fluid is designed for a great price, is affordable and it is black.

Most customers opine that the fluid can be used in place of power steering fluid, but that might not be the case for every vehicle. Further, they also found that the fluid can be used in belt driven CRV transmissions. Moreover, a few also found that this is automatic trans fluid, using 75w90 gear oil for the scion tc with a manual gear box. In short, the tone of buyers is very positive and we believe that the fluid suits the purpose.

Customers also found that its wise to buy a thicker transmission fluid, along with this fluid.

Top Customer Quotes:

This works in about any car or light truck.
This is superior to type f and performs better because it is synthetic versus petroleum.
This is made for the bottom line, is common and it is made for good stuff.
This maintains smooth shifting longer than conventional automatic transmission fluids.

Best With Fast Shipping: Lucas Thicker Transmission Fluid

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Next on the list, we've got yet another fluid that manages to win our hearts. It's the Lucas Thicker Transmission Fluid and it's widely considered as one of the most convenient fluids you can buy. The Lucas thicker transmission fluid comes with amazon prime and it is good in some cases. Make sure this fits by entering your model number. In addition, this works for other cars and it is made for good stuff.

The fluid is effective, can for customer service and it is predictable. And, this is very impressive for hot weather and it has 140k miles. Most importantly, the lucas thicker transmissionfluid is a non-solvent formula that stops slip, hesitation and rough shifting in worn transmissions and completely eliminates most seal leaks.

Most buyers found that the fluid does not replace worn parts but it is a magical glue. In addition, they strongly agree that the fluid is great for manual transmissions too. Moreover, a few say that the car makers went to lower viscosity in trans fluid and motor oils. In short, many have used the fluid for more than a few months without letup, and it shows no sign of giving up.

Top Customer Quotes:

This works like a charm, works great and it tightens up the shifts.
This is running smoother, no shifting hesitations, it felt like new.
It is worth giving it a go.
This is more like prevention and also an early stage fix.

Best For Low Cost: Slippery Pete Thicker Transmission Fluid

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Compared with other fluids in this category, the Slippery Pete Thicker Transmission Fluid has a convenient design. The slippery, thickertransmission fluid will fit red - lined gallon bottles. A 24 inch flexible clear fill tube allows you to direct fluid into tight and awkward places. Further, this is very easy and it allows for a perfect fit.

Finally, the slippery pete thicker transmission fluid is natural, works as expected and it works perfectly.

Most buyers found that the fluid is made for a 4 gallon container of 85. Furthermore, a few also found that the fluid is perfect on the gallon jugs of transmission oil. And, they strongly agree that the fluid is perfect with the motul 75w.

Top Customer Quotes:

This is a good flow of heavy - grade gear oil.
This fits different sized bottle openings with the included adapters.
This makes a big mess and is best done over a large drain pan.
This fluid is more like atf than gear lube and isn't overly thick.

Best With Smooth Shifts: Motul Thicker Transmission Fluid

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Motul offers a variety of fluids for personal choice and yet maintains quality in all the variants. The Motul Thicker Transmission Fluid is great for a great price, It is great with smooth shifts and has an excellent design. . Further, it comes with quick shipping and it comes with great stuff. Finally, the motul thicker transmission fluid works perfectly and it is made for good stuff.

Most customers found that the fluid makes high quality products. Moreover, they say that the fluid can be used on focus rs ptu. Further, a few strongly agree that the motul fluid is much thicker than stock, which likely aids in lubrication. To sum up, for almost all customers, it was the most suitable.

Top Customer Quotes:

This improves shifting smoothness.
This is especially true for gears 1-3.
This is the oil to get for the fiesta., smooth as butter.
This is for sealed trans units.