Castrol Transmax DEX/MERC Automatic Transmission Fluid, 1 Gallon
- Brand:
- Castrol
- Model Number:
- 03520
- UPC:
- 079191335208
- EAN:
- 0079191335208
- ASIN:
- B00DILUBL6
- Walmart SKU:
- 17253576
Trending downward with a $0.00 move to reach $32.88. Current price runs 0.0% below the 90-day average.
| Price Type | Price | Date |
|---|---|---|
|
Highest Price
|
$34.99 | |
|
Lowest Price
|
$23.63 | |
|
Most Recent Price
|
$32.88 |
Tracking History: We have tracked Castrol Transmax DEX/MERC Automatic Transmission Fluid, 1 Gallon since 5/16/2024. The most recent price update was on Jul 23, 2026.
Price Range: Over the past 90 days, the price has ranged from $23.63 (lowest on 2/11/2026) to $34.99 (highest on 10/26/2025). The average price during this period is $31.53.
Current Trend: Walmart.com prices have ranged from $32.88 (Jul 23) to $32.88 (Jul 23) over the past 90 days. Current price is close to the 90-day average of $32.88.
Customer Insights: Rated 4.6/5 from 54 reviews.
I haven't used it yet but I always use castrol and never been sorry it says for older gm transmissions because they've done away with the original trans fluid so hope it works well
Price is right and the oil has proved itself in my 90 Volvo 740. I drive it hard and have flushed it before with this ATF. I am about to change it after many years of use. Oil still smells good and the transmission shifts fine but there is evidence of darkening on the dip stick (probably clutch friction material). Preventive maintenance is the key to avoiding expensive automatic transmission repairs. So I use 12 quarts to flush through the trans to expel all the old fluid. Expensive to use that much but not as expensive as repairing the trans. Machine flushing in a garage uses 15 to 16 quarts! I am a retired mechanic.
The reason our cars have tons of miles on them and still run well is that we only use quality products like this in them.
Only brand of transmission fluid i use. Use it in every classic car
nice quality, after six months the color still red and don't smell smoked.
Very good transmission fluid. Have used it several times. Good quality and very versatile.
Amazing how much slicker the shifts with fluid in the transmission!
I used Dexron VI until it became Dex/Merc. I have always been happy and satisfied with Dex/Merc. I fell it us a high quality fluid that has worked well.
the product is and was excellent. And exactly what it was supposed to be. the reason I only give for out of five is because it took some time to be delivered (almost two weeks) but nobody else had it in stock and it was my only option at the price (which is very reasonable) I'd definitely buy again.
ai like everything about the product product. However, the gallow jug was leaking, and the fluid flowed to inside the box. I sent it back
Detailed price history for the past 90 days
Walmart.com prices have ranged from $32.88 (Jul 23) to $32.88 (Jul 23) over the past 90 days. Current price is close to the 90-day average of $32.88.
| Date | Price | Change | % Change |
|---|---|---|---|
| $32.88 | $+0.00 | +0.0% | |
| $32.88 | $+0.00 | +0.0% | |
| $32.88 | $+0.00 | +0.0% | |
| $32.88 | $+0.00 | +0.0% | |
| $32.88 | $+0.00 | +0.0% | |
| $32.88 | $+0.00 | +0.0% | |
| $32.88 | $+0.00 | +0.0% | |
| $32.88 | $+0.00 | +0.0% | |
| $32.88 | $+0.00 | +0.0% | |
| $32.88 | $+0.00 | +0.0% | |
| $32.88 | $+0.00 | +0.0% | |
| $32.88 | — | — |